Robinho has not travelled with Manchester City ahead of Thursday's Uefa Cup clash with Schalke but Mark Hughes remains hopeful that he will be fit to face Manchester United at the weekend.
The Brazilian picked up an ankle injury against Arsenal on Saturday and has failed to recover in time for the trip to Germany.
Elano and Pablo Zabaleta have also stayed in England but should be in contention for the Manchester derby.
"We have left Robinho behind. He has to recover from an ankle injury and hopefully he will be OK for the weekend," Hughes told Sky Sports News.
"Elano hasn't travelled. His wife has just had a baby and had a major procedure.
"Pablo Zabaleta has got a thigh strain and we are hoping that will resolve itself by the weekend."
Hughes has refused to be drawn on speculation linking a number of top players with moves to City.
City are reportedly interested in signing the likes of Ricardo Oliveira, Kolo Toure, John Terry, Ashley Cole and Kaka in the January transfer window.
City have the financial backing of new owners the Abu Dhabi United Group and Hughes has confirmed that he will be looking to bring in reinforcements.
"We want to bring in good players if they are available but they will be the right players in the right positions to make sure the squad and the team is balanced," he explained.
"You can pluck any names out of the sky but we know what we need to pursue to make us stronger.
"It is a big list (players to be linked with City) and it is getting bigger by the minute. People have to be realistic and when we have news we will tell you."
Hughes is targeting three points against Schalke but accepts that City's away form has been poor this season.
He said: "We are looking for a positive result. If you pick up points away it helps, although the main thing obviously is to win your home games.
"We obviously go into the match on a high. We had a great result on Saturday (beating Arsenal) and it was a good start to a big week for us.
"On the road we have not been as accomplished as we have been at home. We've looked a little bit suspect defensively on our travels and we are hoping to tighten that up.
"We haven't really been able to have a settled back four for any length of time and that obviously impacts on the rhythm of our play."