Chelsea boss Thomas Tuchel has received a huge boost in the form of Mateo Kovacic returning to training.

The Croatian will not play in their upcoming UEFA Champions League clash against Zenit St. Petersburg in midweek.

However, The Times states that the 27-year-old has recovered from a hamstring issue that he sustained in October in training.

He is in full training this week, and will build up a fitness with a few to getting in the squad for their Premier League game against Leeds United on Saturday.

Kovacic is likely to make the bench for that game, as he is slowly eased back into action.