Retsos is shown a yellow card for a rash challenge on the halfway line.
119'
We are into the final 60 seconds of extra-time. Can United hold on or will Reading find a dramatic equaliser?
118'
Good save! McCleary lays the ball off for Pele to strike from the edge of the area. Henderson has to get down and push the effort away.
117'
Reading were also involved in extra-time during the previous round. They beat Cardiff on penalties that day and, as things stand, would certainly take another shootout here.
112'
A strange decision from O'Connell, who tries his luck from 45 yards out with a truly ambitious effort that goes high into the stands. His team-mates and manager will certainly not thank him for that. Keeping the ball is everything in these closing stages.
106'
Reading get us going once more. Can they find a second equaliser?
105' +2
HALF-TIME: READING 1-2 SHEFFIELD UNITED
105' +1
B. Sharp has scored a goal for Sheffield United! Assist by L. Freeman.
SHARP!!! 2-1 SHEFFIELD UNITED! It had to be him! The skipper gains a yard of space at the far post to meet Freeman's pinpoint cross and firmly plant a header beyond Rafael.
Freeman demonstrated terrific vision and awareness to pick out Sharp at the far post.
105'
S. Baldock enters the game and replaces A. Rinomhota.
G. McCleary enters the game and replaces Y. Meïté.
P. Retsos enters the game and replaces L. Freeman.
Meanwhile, Garath McCleary is introduced with Meite making way.
Reading respond with a double-change. The first sees Rinomhota withdrawn in favour of Sam Baldock.
United also turn to the bench with the impressive Freeman given a well-earned rest. Panagiotis Retsos comes on for his debut.
Minute
Description
103'
Reading continue to ask questions and a headed clearance only reaches Rinomhota on the edge of the area. The midfielder evades Osborn's challenge before sending a volley just wide of the target.
101'
Swift seeks out the run of Meite with a long diagonal ball into the box. However, there was just too much pace and it runs behind for a goal-kick.
99'
J. Robinson enters the game and replaces S. Berge.
United also turn to the bench, introducing Jack Robinson in favour of Berge.
98'
Pelé enters the game and replaces O. Ejaria.
A. Masika enters the game and replaces M. Olise.
That was Ejaria's last action as he goes off to be replaced by Pele.
Another Reading change sees Olise make way for Ayub Masika.
97'
Including the goalkeeper, United have 10 men behind the ball as Reading look to make something happen. Ejaria suddenly bursts into life on the edge of the box and Basham is forced to stop him in his tracks, albeit at the expense of a corner.
95'
It is a tough one to call at the moment. Understandably, neither side are particularly willing to chance their arm too much and potentially leave themselves exposed.
93'
Arsenal, Chelsea and Newcastle United have already booked their places in the quarter-finals of the FA Cup. The question is: who will join them?
91'
Off we go! United get extra-time underway.
90' +3
END OF 90 MINUTES: READING 1-1 SHEFFIELD UNITED
90' +1
There are going to be two minutes of stoppage time. Can either side find a winner or are we destined for extra-time?
89'
The Blades can relax for a moment as they deal with the initial delivery, before the subsequent return cross has too much power and runs behind for a goal-kick.
88'
At the other end, Reading have a corner after Henderson is forced to tip Swift's deep and dangerous behind with Meite lurking.
84'
United look to turn up the pressure as the clock ticks down towards the last five minutes. Basham gets his head on the end of a deep cross, but can generate enough power and accuracy to trouble the goalkeeper.
79'
B. Sharp enters the game and replaces D. McGoldrick.
United make another change as McGoldrick makes way to be replaced by Billy Sharp.
77'
A brief worry for Reading as Meite stays down after taking an accidental blow to the jaw. However, the Ivorian is soon back on his feet after just taking a moment to gather himself.
75'
GOOD EFFORT! Space opens in front of Freeman, who tries his luck with a terrific long-range effort that Rafael is forced to beat away to safety.
72'
McGoldrick will be hoping to feature for the Republic of Ireland in their Euro 2020 play-off against Slovakia later this month. The Green Army are aiming to qualify for a third consecutive European Championship, and the striker will be desperate to be involved.
67'
We are into the final quarter of this fifth-round clash. Still, nothing can separate the sides. It is set to be a dramatic finish at the Madejski.
63'
Almost! Swift demonstrates terrific vision as he looks to pick out Meite with a delicious lofted ball into the area. However, at full-stretch, the Ivorian is just unable to get there ahead of Henderson.
61'
O. McBurnie enters the game and replaces L. Mousset.
United make their first change of the game as Mousset goes off to be replaced by Oli McBurnie.
58'
Puscas wants a penalty as he goes to ground under a challenge from O'Connell. However, the referee is not interested and quickly waves away his appeal.
55'
Yiadom can see the headlines as he controls the ball on his chest before volleying for goal from the edge of the box. However, the right-back gets it all wrong and sends his effort high into the stand.
51'
A. Rinomhota gets yellow.
Rinomhota is shown the first yellow card of the game for pulling back Freeman, who was threatening to counter for United.
49'
Reading stand firm as Rafael comes out of goal to gather in the air. The Brazilian is making his first appearance in this season's FA Cup, having been rested in the competition until now.
48'
United looking to regain the initiative as they are awarded a free-kick near the corner flag. What can they make of this?
46'
We're off and running again as United get the ball rolling once more.
45' +1
HALF-TIME: READING 1-1 SHEFFIELD UNITED
43'
Penalty goal scored by G. Puşcaş for Reading!
NO MISTAKE FROM PUSCAS!!! 1-1! The Romanian steps up and calmly plants his penalty into the bottom corner and well out of Henderson's reach.
39'
Instead of going straight onto the attack, Reading opt for a patient build-up to gradually break down the stubborn United defence. However, they are eventually unable to maintain possession and the visitors regain control.
37'
Can Reading respond? They earn a throw near the corner flag after good work from Obita down the left.
35'
Having opened the scoring in this game, McGoldrick is hungry for more goals. The Republic of Ireland international tries his luck from outside the area, and Rafael is forced to spring to his left and parry the ball away to safety.
32'
The home fans try to get behind their team as they enjoy a rare lengthy spell of possession. Bowen will be urging his players to push forward more and ask questions of the United defence.
30'
United continue to threaten from set-pieces, but Reading stand firm following another corner and can relax for a moment with a goal-kick.
27'
Can United press home their early advantage? They have just been awarded the first corner of the game.
25'
Reading are just unable to get hold of the ball at the moment. United have been solid in possession thus far and the hosts are still to really get into their flow.
23'
This is the first time in four games that Wilder has not named the same United starting line-up. You would not have known, though, given the way they have quickly settled into their rhythm today.
15'
Henderson continues to highlight his ever-growing reputation with magnificent reflexes to keep out Meite's strike. The Manchester United loanee is being tipped for an England call-up and that save further demonstrated why.
13'
GREAT EFFORT! Meite draws a terrific save out of Henderson. Reading launch their first meaningful attack of the game and after cutting in from the right wing, Meite lets fly with a thumping 30-yard effort that is destined for the top corner but for the goalkeeper's intervention.
11'
The visitors go in search of a second goal and a deep cross reaches Mousset. However, the striker is unable to get the ball under control and Rafael gathers.
8'
These are exciting times for the Blades. They are currently eighth in the Premier League and just two points off the Champions League places. A potential FA Cup quarter-final berth would only add to the increased levels of optimism surrounding Bramall Lane.
6'
United had the weekend off due to Aston Villa's Carabao Cup final commitments and their freshness is evident. They have made a quick start to this contest and are looking sharp in possession.
4'
The perfect start for the Blades at the Madejski Stadium. Less than 90 seconds had passed when McGoldrick headed them in front. Reading must dust themselves down and try not to get too downhearted.
2'
D. McGoldrick has scored a goal for Sheffield United! Assist by B. Osborn.
WHAT A START!!! McGOLDRICK HEADS SHEFFIELD UNITED IN FRONT AFTER JUST 85 SECONDS! Freeman wins the ball back in midfield and drives forward before feeding Osborn, whose delicious cross is guided home by McGoldrick.
Osborn provided a magnificent cross that was simply begging to be attacked.
1'
Kevin Friend is our referee today. He blows his whistle and Reading get the match underway.
Hello everyone and welcome to live text coverage of the FA Cup fifth-round clash between Reading and Sheffield United at the Madejski Stadium.
With no replays at this stage of the competition, we will find out today which side will book their place in the quarter-finals.
READING (4-5-1): Rafael; Andy Yiadom, Matt Miazga, Michael Morrison, Jordan Obita; Yakou Meite, Andy Rinomhota, John Swift, Ovie Ejaria, Michael Olise; George Puscas.
SUBS: Sam Walker, Liam Moore, Tyler Blackett, Pele, Ayub Masika, Garath McCleary, Sam Baldock.
SUBS: Michael Verrips, Phil Jagielka, Jack Robinson, Panagiotis Retsos, Richairo Zivkovic, Oli McBurnie, Billy Sharp.
SHEFFIELD UNITED (3-5-2): Dean Henderson; Chris Basham, John Egan, Jack O'Connell; George Baldock, John Lundstram, Sander Berge, Luke Freeman, Ben Osborn; David McGoldrick, Lys Mousset.
The teams are out on the pitch and kick-off is moments away.
That leaves this tie very finely poised heading into the second half. Remember, one way or another, there will be a winner today - even if we require extra-time and penalties.
With no replays at this stage of the FA Cup, we are going to play another 30 minutes at the Madejski and, if necessary, that will be followed by penalties.
Nothing could separate the two sides over 90 minutes. One goal in the next half an hour could well decide the tie.
Could that prove to be the winning goal? As he has been so many times over the years, Sharp was in the right place at the right time to deliver the finish.
United's amazing season goes on. They will look to continue their momentum at home to Norwich City in the Premier League on Saturday. Meanwhile, Reading return to Championship action on the same day away at Birmingham City.
That's all for today. We hope you've enjoyed our live coverage. Until next time, goodbye!
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