The Croatian midfielder has not played since the FA Cup semi-final win against Crystal Palace at Wembley when he came off halfway through the game due to excessive pain.
It’s been a stop start campaign for the former Real Madrid man but he’s been very special when he’s fit, and is one of the players the manager calls on when he wants to keep the ball.
Andreas Christensen rumoured to have signed a contract with Barcelona was also back in training having missed the last two games through an injury.
The defender alongside Antonio Ruidger are all heading out of the Stamford Bridge but not until they help Chelsea finish as high as they can in the league and also attempt to win the FA Cup at Wembley next month against Liverpool.
Chelsea could only draw away to Manchester United in midweek, a result that faltered the home side given the amount of chances Chelsea created but Tuchel knows that he will need to shut out the noise from the on-going sale of the club by just winning football games, something that has less consistently lately.
That cause will be massively aided by the return of Andreas Christensen and Mateo Kovacic both a key part of the way he wants to play and have always delivered for the German manager since he took over from the man he will be facing, Frank Lampard.
Everton come into the game on the back of a bruising 2-0 defeat to Liverpool in the derby but the Merseyside are in a relegation dogfight and will try to stifle and frustrate the Blues as much as they can to at leats get something from the game.
Another fresh face that was seen at training was Ross Barkley and even though the Englishman has barely played this season, his presence give numbers and adds to to the growing options for the Chelsea boss.