Germany defender Robin Koch was due to undergo knee surgery on Tuesday after aggravating an existing injury in Leeds United's Premier League defeat to Chelsea at the weekend.

The 24-year-old initially sustained the injury on his debut in the opening game of the season against Liverpool.

But after playing through a hectic spell of 10 games plus an international break with Germany, Koch suffered further damage in the 3-1 loss to the Blues at Stamford Bridge on Saturday.

"Unfortunately, following a collision in the Chelsea game, he suffered further damage to the knee and the club have made the decision that surgery is required to remedy the problem," Leeds said in a statement.

It is another blow for Leeds boss Marcelo Bielsa, who has only two fit senior centre-backs in his squad.

Diego Llorente and Liam Cooper are Bielsa's current remaining options, with no indication yet as to how long Koch will be sidelined for.