Jose Mourinho has a hectic schedule
That is according to Mark Lawrenson.
Manchester United were involved in Europa League action last night and drew 1-1 away to Anderlecht in the first leg of their quarter-final tie.
Chelsea meanwhile, have had the whole week to prepare.
Manchester United v Chelsea combined XI Wed, April 12, 2017
Express Sport brings you our combined XI of Manchester United and Chelsea stars ahead of the Premier League clash at Old Trafford on Sunday (4pm)
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Who makes our combined Manchester United and Chelsea XI?
Mark Lawrenson thinks Chelsea should beat Manchester United
I was tempted to go for a draw but, because of United's schedule, I am going to back Chelsea to take another step towards the title
And Lawrenson thinks this will be the telling difference going into Sunday’s showdown (4pm) at Old Trafford.
“Manchester United are in action on Thursday in the Europa League and are struggling for numbers a little bit," Lawrenson told BBC Sport.
“Chelsea, meanwhile, have had the week off after their win at Bournemouth last weekend – this where not being in European competition makes a massive difference.
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“With United boss Jose Mourinho saying his side's best chance of making the Champions League is by winning the Europa League, you would expect him to play his strongest side against Anderlecht, who they play either side of this game.
“I was tempted to go for a draw but, because of United's schedule, I am going to back Chelsea to take another step towards the title.”
Chelsea, who beat United 4-0 at Stamford Bridge back in October, are seven points clear of closest title challengers Tottenham.