The defender has been sidelined with a groin injury since the first match of the Barclays Premier League season but has travelled to the Czech Republic intent on being restored to action.
It had been expected the Belgian would make his return in a derby with city rivals United at the weekend, although it now appears likely that he will have a chance to find his feet on foreign soil first. City open the group stage against Plzen ahead of subsequent ties with CSKA Moscow and holders Bayern Munich.
The presence and leadership of Kompany will be a necessity, then, although Pellegrini will only afford his captain game time this evening if he can prove that he is fully recovered from his injury. "Vincent has worked with us normally for the last two days," said the City manager, who is also without other defenders in Gael Clichy, Micah Richards and Martin Demichelis tonight. "We will see if he is 100%. If he is, of course he will play. We will talk with the doctor and decide. I think he will be 100% but if he is not he will not play. We have a very important match but we have other players if any are not 100%."
Those are sentiments any manager would use to maintain morale but Pellgrini would likely acknowledge privately that the loss of Kompany in recent weeks has left a hole which none of his players have been able to fill sufficiently. City suffered from aberrant defending in a defeat by Cardiff City in just the second league match of the season and were tested again by Stoke City at the weekend.
"Vincent has been injured for about one month," said the City manager. "Vincent is very important but we have a squad. We have replacements for any player who is injured."