Balotelli’s 2012-13 season by numbers* 10 starts in all competitions* 11 substitute appearances* Three goals in all competitions* One Premier League goal* Three yellow cardsMANCHESTER City striker Mario Balotelli appears to have been involved in a training ground bust-up with manager Roberto Mancini.A picture agency has released photographs it says were taken on Thursday morning of the pair having to be separated by staff and team-mates at Carrington training ground. City have declined to comment.Mancini is expected to answer questions about the incident at his media conference on Friday morning.The pictures appear to show Mancini shouting and gesticulating towards Balotelli. One photograph shows the pair face to face with Mancini pulling Balotelli’s training bib.Another picture appears to show Balotelli being pulled away by a member of staff.Striker Balotelli, 22, has been involved in a series of controversies during his time at the club.