LIONEL MESSI is on the verge of quitting Barcelona after requesting to leave his boyhood club. The 33-year-old Nou Camp legend demanded Barca exercise a clause in his contract that would allow him to quit for nothing with immediate effect. MESSI TRANSFER NEWS LIVE: Breaking news on stunning exit from Barcelona But the Spanish giants believe the stipulation expired expired on June 10, with the Argentine superstar under contract until the summer of 2021. Club and player seem set for a legal battle over the clause, with Barcelona believing his €700m (£629m) buy-out clause is still valid. And with wages totalling £1.15m per week – it leaves very few teams capable of facilitating a move for Messi – here SunSport list five possible options. MANCHESTER CITY Since Pep Guardiola – who managed Messi for four seasons – took over at the Etihad in 2016, he has spent £700m on transfers. It indicates they have the backing to pull off a mega-money transfer for Messi, despite escaping a Financial Fair Play penalty this year. Acccording to Radio Catalunya, Messi has already spoken to Guardiola about a move to Manchester. And having grown frustrated throughout last season, reuniting with a familiar face could…