Will Theo feel the Elland Road wrath?
Barely two minutes after the first match at the Emirates ended, Theo Walcott (11/2 first goal) admitted that he had taken a dive to try win a penalty, moments before he was felled again in the box to allow his captain Cesc Fabregas (5/1) to force this replay by scoring from 12 yards.
For now, the young England winger has gone unpunished, but you can be sure if he plays at Elland Road, the Leeds (9/2, draw 3/1, Arsenal 4/7) fans will certainly punish him, by telling him what they think to people who cheat.
It seemed a strange thing to do, to tell the media that he was purposely trying to gain an advantage, nobody would've guessed that he dived and now it will make referee's think twice before awarding Arsenal penalties in the future, although they did get one at West Ham on Saturday.
Of course, Fabregas' 90th minute spot-kick wasn't the only one of the game as Leeds had gone ahead through a penalty of their own, and our Match Winner Offer is giving you odds of 7/2 that there will be a penalty scored in this replay, including extra-time.
I think the game could well end up being decided in ET (40/1 Leeds, 8/1 Arsenal) or even the dreaded penalty shoot-out (18/1 Leeds, 14/1 Arsenal), Arsenal obviously have the more skilled players, but that won't stop Leeds going at it hammer and tong for the duration.
That's what you have to respect about Simon Grayson's team, they go out to win every game, no matter who the opponent, they might not have been in the top flight for six years, but they've more than matched some of the Premier League's big guns over the past couple of seasons.
We all know Arsenal play fantastic football, but Leeds can pass and move as well as anybody at the minute, with the wide men Max Gradel (9/1 first goal) and Robert Snodgrass (10/1) at the heart of everything that's good about United, and the ever improving Jonny Howson (12/1) pulls the strings in the middle of the park.
The nucleus of Leeds' squad looks good for a few years, with time very much on most of the player's sides, but one of the players that is in that spine is Luciano Becchio (6/1) who might have to miss out on the special evening.
The Argentine has 13 goals this season and has been excellent in his hold-up play, but he picked up a back injury in the weekend defeat of Scunthorpe and is a doubt for Wednesday, if he isn't fully fit then Billy Paynter (15/2) will probably replace him as Davide Somma (15/2) doesn't really work as a lone striker.
It will be a shame for Whites fans, but they'd rather have their main striker fit for the Championship game at Portsmouth on Saturday than the cup match.
That's pretty much the only injury concern for Grayson, otherwise I would expect a full-strength team to line-up at 20:00 on Wednesday, the Arsenal team, as ever, will be difficult to predict.
I would imagine that Samir Nasri (9/2) and Robin van Persie (7/2) won't start the game, but Arsene Wenger wants to challenge on all four fronts, so they might be on the bench.
Nicklas Bendtner (4/1) could've ended the need for this replay by scoring his chance after Fabregas' penalty, but even though he fluffed that opportunity I think he'll get the nod over RvP, possibly with Marouane Chamakh (3/1) again.
Lukasz Fabianski is still out, so the young keeper Wojciech Szczesny will retain his place, the Polish stopper was excellent in the original tie, his save from Becchio was particularly impressive, and has done much to enhance his future chances in subsequent games for the Gunners.
Aaron Ramsey (8/1) could be in line to make his first start since he suffered his broken leg, and Tomas Rosicky (8/1) is likely to return too after he missed the trip to Upton Park at the weekend.
It promises to be another cracking match, and I think goals are certain to again be on the menu, over 2.5 is 4/6, both teams to score is a 7/10 chance, the bet I like the look of though is Leeds at 5/4 in the double chance market, they will take it to Arsene's men from the off, there's no doubt about that and should get plenty of chances.