David Silva is a doubt for Manchester City ahead of Sunday's derby with United

David Silva is an injury doubt for Manchester City's derby with Manchester United on Sunday, Pep Guardiola has confirmed.

The City boss revealed Silva "felt uncomfortable" following his match-winning 83rd-minute goal against West Ham at the Etihad last weekend.

Silva did not travel with the City squad to Ukraine for their final Champions League group-stage match with Shakhtar Donetsk on Wednesday, and Guardiola is unsure if he will be available for Sunday's derby, live on Sky Sports Premier League.

"David had a little bit of problems in the last minutes," Guardiola said during Tuesday's pre-match news conference.

#PEP: @21LVA felt uncomfortable after his goal. He felt something. Hopefully he can play on Sunday. #fcsdvcity — Manchester City (@ManCity) December 5, 2017

"We made a test after the game and I don't know if he is able to play on Sunday, so that's why he stayed there, to recover in Manchester."

Guardiola was asked for further clarification on the nature of the injury but was unwilling to elaborate.

He said: "It's something, something uncomfortable he felt in the last minutes, before the goal he felt something."

The Manchester Derby - Live on Sky Sports - Sunday December 10th. The Manchester Derby - Live on Sky Sports - Sunday December 10th.

After being asked again, Guardiola laughed and said: "Hopefully he can be fit for Sunday but it was too risky to play him [Wednesday]."

The Spanish international has played a key role in City's unbeaten start to the season, recording eight assists and two goals in 15 games.

Silva 'felt uncomfortable' after scoring City's match-winning goal against West Ham on Sunday

City sit top of the Premier League, eight points ahead of rivals United, having dropped just two points so far this campaign.

As well as replacing Silva, there will be another enforced change with Kevin De Bruyne suspended but Guardiola may consider giving youngsters Phil Foden, Brahim Diaz and Tosin Adarabioyo a chance. All three have travelled with the squad.

But Guardiola insisted he will not be taking the game lightly. Victory would be City's 21st in succession in all competitions.

Guardiola said: "We travelled here to win the game, to make a good performance and show respect for the clubs and this competition. We are preparing to win the game and trying to do as much as possible to make a good game."