Frank Lampard’s Blues welcome struggling Manchester United to Stamford Bridge on Monday night.
Chelsea enjoyed a superb start to the season and remain fourth in the Premier League despite a slight wobble in recent weeks.
Ole Gunnar Solskjaer’s Red Devils, meanwhile, are only eighth having won just nine of their 25 league games this season.
Discussing the match for Sky Sports, Nicholas said: ‘We have another very intriguing match on the cards on Monday.
‘The race for the top four is fascinating. Can Chelsea make it? Again, they are a side who are quite awkward at home.
‘Tammy Abraham had a few niggles before the winter break, while Mason Mount was left out for the game against Arsenal and these things can start to take a strain.
‘Willian has been class but went cold for a few games, so the break may have come just at the right time for them so that they can get back to the basics.