Chelsea face a massive test of their title resolve this weekend.Antonio Conte's men may well be seven points clear at the top, but with an in-form Tottenham Hotpsur playing Bournemouth at home 24 hours before Chelsea's game with Manchester United on Sunday, the Blues face the very real possibility of starting the game at Old Trafford with their lead cut to just four points.That's pressure enough, but then throw in a few subplots and it's all set for a Super Sunday in every sense in Manchester.The key factor here being is that Chelsea aren't just facing United anymore: This is Jose Mourinho's Manchester United. And after two defeats already against his former club this season, Mourinho is a wounded beast.Chelsea know all too well how Mourinho reacts to defeat against a foe and with supremacy on the line this weekend, a foe is what Chelsea very much are in the United manager's eyes.The past is the past. That means Chelsea and Mourinho, regardless of the passionate love affair that existed between themnot once, but twiceare enemies, and Sunday's showdown couldn't have come at a better moment for the neutral.Not only are Chelsea pushing for the title, United themselveswith a game in hand over Manchester City and four points behind themhave an outside chance of finishing in the Premier League's top four.Defeat for either side will be a major setback.So what do Chelsea fans make of it all' Is there one United player that is giving them sleepless nights ahead of Sunday' Is there an added spice to the rivalry between both clubs' And what of Mourinhodo they even care anymore'Bleacher Report took to Twitter to answer some of these questions ahead of kick-off.Which Manchester United player, past or present, do Chelsea fans love to hate'You would have to have a particularly short memory not to remember the chief villain from when Chelsea and Untied last came to blows.It was in the FA Cup last month and Ander Herrera was sent off as the Blues ran out 1-0 winners, progressing to the semi-final, where they will face Spurs next weekend.Herrera was among the many players who had attempted to stop Eden Hazard in his tracks that evening by, well, kicking lumps out of him. It worked up to a point until referee Michael Oliver had seen enough and Herrera, the protagonist, received his marching orders after 35 minutes.If that wasn't bad enough, the Spaniard's protestations with Oliver after stood to make him Public Enemy No. 1 all the more. Herrera took his time to walk down the tunnel at Stamford Bridge, feeling aggrieved. And after seeing Hazard kicked all across the pitch, Blues supporters were baying for blood.So it's no surprise then that Herrera topped our poll as the one United player, past or present, whom Chelsea fans love to hate.Interestingly, Roy Keane came in second ahead of fellow hate figures Wayne Rooney and Gary Neville. It says something about football fans and their tastes: They all love a bad boy when he's one of their own, but put him up against you and it's a different story altogether.Keane still doesn't mince his words as a TV pundit, and in his heyday as a player, he was often found scrapping with the likes of former Blues captain Dennis Wise. Chelsea fans haven't forgotten his "crimes" against their club.Which Manchester United player will be the biggest threat on Sunday'From hatred to a very different kind of emotion: love. Well, sort of.For any fan to admit admiration for an opposition player, it's always done through gritted teeth. There are two ways this is shown; either fans fear a player or they partake in an unrequited love, flashing doe eyes at an opponent in the hope he will sign for their club.We deal with the latter in our third point below, but looking ahead to Sunday's game, at the forefront of Conte's mind and that of Chelsea fans, will be how to stop United from inflicting damage on them.It may have been another underwhelming campaign at Old Trafford this season, but the fact remains they have individuals who can turn games with a flash of brilliance.Despite costing them north of 90 million, Paul Pogba hasn't shown himself to be that man just yet. That said, Zlatan Ibrahimvic, Henrikh Mkhitaryan and Marcus Rashford all have the ability to upset Chelsea's title charge.Indeed, Rashford came close to sending last month's FA Cup tie into extra-time when he broke free from Gary Cahill to find himself one-on-one with Thibaut Courtois, who expertly saved his effort. That was a hearts-in-the-mouth moment that outlined Rashford's threat on the break despite a tame finish.Mkhitaryan was substituted early in that game after Herrera had seen red, yet he had already caused panic at the back for Chelsea, as he has against most teams whenever he has featured this term.Blues fans know that tie would have been different had Ibrahimovic not been suspended, though. The giant Swede has scored an incredible 28 goals in all competitions for the Red Devils this season, outlining what a supreme talent he is.Take Ibrahimovic and his goals out of Mourinho's side and their struggles would be amplified more so than they have been. He is their talisman, which Blues fans recognised when we asked them who will be the biggest threat come Sunday.Just shy of 70 per cent said Ibrahimovic, which is as close to them admitting fear as we'll ever get.Which current Manchester United player would Chelsea fans most like the club to sign'Speaking of short memories earlier, it's clear Blues fans are capable of casting their minds back further than most football fans are given credit.Juan Mata was a hero at Stamford Bridge. He was named Chelsea's Player of the Year in the two full seasons he spent at the club from 2011/12 to 2012/13. He won the Champions League, FA Cup and Europa League in that time, playing a pivotal role in that success.He may now wear United's red jersey but none of that has ever been forgotten, with Chelsea supporters on Twitter marking him out as their top choice from Old Trafford should Conte ever feel tempted to snatch a player from under Mourinho's nose.The Jose Mourinho factorThe presence of Mourinho is becoming the elephant in the room where Chelsea are concerned. There are those fans who want to boo him and label him a Judas figureas a minority did last month at Stamford Bridgewhile there are others who still applaud him for what he achieved in west London.Judging from our Twitter poll, the mood is swaying more in favour of the former. Mourinho's Chelsea legacy is being diluted and, in some ways, the memory of his success is being scrubbed from history.Conte has been a breath of fresh air since his arrival last summer. He's addressed some of Chelsea's problems and in so doing has propelled them back to the top of English football. With seven games remaining, however, he hasn't won anything yet.The Italian still has some way to go to prove he has the stamina required to build something at Stamford Bridge. That starts with trophies, but also constructing a formula that can deliver in the way Mourinho did.Regardless, Chelsea fans aren't interested when it comes to comparing Conte with Mourinho. From the results of our poll, it's safe to say there is no comparison between the pair. Conte wins without a fight.And that's all despite Mourinho winning three Premier League titles at Chelsea and building the team that would last a decade together to bring the club unprecedented levels of success.Love affair' What love affair' Any emotion for Mourinho has been buried, it seems.
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