By Felix Keith Roy Keane has admitted he was heartbroken to miss Manchester United’s famous Champions League final win over Bayern Munich in 1999. United won the Treble in the 1998/99 season, with Sir Alex Ferguson ’s side claiming the Premier League, FA Cup and Champions League trophies. It was an impressive achievement that has gone down in the club’s history and made the squad revered by fans. Keane was captain of the team and played in the 2-0 win over Newcastle in the FA Cup final on May 22, but like Paul Scholes, was unable to take the field four days later in Barcelona. The Republic of …