CHELSEA'S Italian star Gianluca Vialli claims the tension of not being able to hold down a first-team place at the London club has been giving him stomach aches. The former Juventus captain, who has started just three of the last 18 matches, says being a non-starter may prompt him to decide whether or not to leave the ambitious outfit before the end of the season. Chelsea boss Ruud Gullit generated great excitement among Chelsea fans when he persuaded the Italian striker to join his increasingly cosmopolitan squad before the start of the season. But the Dutchman has preferred to pair rejuvenated former Manchester United striker Mark Hughes up front with Italian ace Gianfranco Zola. Hughes is currently playing some of his best football but Gullit admitted after Sunday's 6-2 thrashing of Sunderland that he 'felt sorry' for Vialli, who 'doesn't deserve to play only 10 or 15 minutes.' And 32-year-old Vialli indicated that prolonged life on the subs bench could force him to end his career elsewhere. 'The fans and the team are magnificent with me, and I couldn't ask for more,' said Vialli, still joint top scorer with 11 goals despite making just 19 starts all season. 'But every time I go to a match I feel a stomach ache because of the tension and because I know that I will only play if things turn a certain way. 'I feel myself almost wishing the opposition will score first if that means I'll get the chance to go on and play. 'It isn't nice at all for a player to feel pushed into these kind of thoughts.' Vialli, whose Stamford Bridge contract has two years to run, added: 'I will use the remaining months of this season to decide what I should do with my career regarding the two years I have left. 'I believe they are pleased with me and my attitude and do not want to sell me. 'Perhaps I can adjust to the stomach aches and the role of a super sub - that can have its own meaning and value, even though I would like to play regularly.'