It really felt like Kai Havertz was starting to find his feet as a Chelsea player in recent weeks.
The young German had a tough start, and Frank Lampard was trying to fit him into the starting XI in different positions.
He was played out wide, centre forward and, mainly, as a number ten. But it wasn’t until the 4-3-3 came back to the Blues that Havertz looked at his best.
Playing on the right of three in midfield, the 21-year-old got on the ball more and was able to influence play.
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He showed it in the 3-0 wiu over Burnley, and the Germany international provided a great balance in midfield with Mason Mount and N’Golo Kante.
However, Havertz was unable to continue that form against Rennes and Sheffield United when he tested positive for coronavirus ahead of the Champions League match.
Instead, for the latter game Mateo Kovacic came back into the starting XI in his position and performed well.
The Croatian set up the opening Chelsea goal from Tammy Abraham, while showing why he was player of the season last year.
For Lampard, the dilemma will be what to do for the next Premier League match when the Blues travel to Newcastle United on November 21.
Havertz is currently still self-isolating after his positive test, but is expected to be back in time for the Magpies.
It is likely the young German star will come back into the fold and look to continue the form he showed before his illness.
However, Kovacic has really put himself back in the frame, after being left on the sidelines for much of the campaign so far.
The Croatian will surely be used more often as the fixtures continue to pile up and the Blues will be getting into the busy months of December and January.