Chelsea owner Roman Abramovich is torn on the future of manager Andre Villas-Boas Relations between him and Abramovich have improved dramatically in the past year with the Chelsea owner having previously told friends he would never accept Mourinho back. The timing of any change - should it be made - is now the focus for debate at Stamford Bridge. Chelsea have a busy schedule to contend with that includes three Premier League games - against Bolton, West Bromwich and Stoke - and an FA Cup replay at Birmingham before the return leg against Napoli on March 14. If Villas-Boas is sacked it would be viewed by many as a harsh decision given that many at Chelsea accept that he is a fine young coach. The fear remains that if he does leave he will be snapped up by one of Europe's leading clubs and go on to prove he is a world-class manager. He has also had to deal with a number of problems and slices of bad luck, not least the loss of John Terry, who underwent surgery on Wednesday to explore the extent of a knee injury. The captain could miss up to eight weeks as he recovers from the bone bruising he suffered in colliding with a post during an FA Cup tie last month. On Wednesday defender Branislav Ivanovic called for an end to the dressing-room tension and said it was time for the players to get behind the club. These things always happen when you are losing. They come out," he said of the sense of unease. Everybody has to still believe, try to do the right things. I don't know what the manager is saying. But I think this is more about Chelsea; more important than the relationship between managers and players. Chelsea has to be first for everybody, first for everyone to get a result. The manager who decides who plays is doing his job. We have to use every minute on the field when we get the chance. Everyone has to think like that and try to make this position better because we have a lot of things wrong. Ivanovic said he was convinced that Villas-Boas would remain. "I can say he will stay," he said. We have to be focused on our jobs. We don't have to care about these things. It is a hard position, of course it is important we stay together because our team, our squad is not doing how people expect of us. For me this is the hardest moment during my four years here. We haven't won a lot of games and the confidence is not in the best way. But it is only by working hard and trying to do things well, keep going and be positive.