The Indian Premier League faced its first on-field controversy with allegations that Harbhajan Singh hit Sreesanth, his India team-mate and IPL rival, after Friday's match between the Kings XI Punjab and the Mumbai Indians in Mohali. While Yuvraj Singh, Sreesanth's captain, said Harbhajan had apologised after the incident, it remains to be seen how the IPL will handle it as a disciplinary issue.Sreesanth, who took two wickets for Punjab, was spotted in tears after the match.Sources close to him said that after the match a smiling Sreesanth walked up to Harbhajan - the captain of the losing Mumbai Indians - and said "Hard luck". "That was when Harbhajan lost his cool and hit Sreesanth.