Mayo could be missing some key players for their Connacht SFC opener against London on Sunday.
Bidding to win the Nestor Cup for a sixth successive season, the defending champions are likely to be without current Young Footballer of the Year Diarmuid O'Connor, who has a hamstring injury.
Andy Moran and Chris Barrett are other doubts for the trip to the English capital, while manager Stephen Rochford is also sweating over both of his first-choice midfielders, Seamus O'Shea and Tom Parsons.
Tweet