Sunderland manager Steve Bruce has cursed the 'freak' training ground accident that has left goalkeeper Craig Gordon sidelined.[LNB] The Black Cats' first choice will miss the start of the Premier League season after breaking his arm for the second time in eight months last week.[LNB]The injury comes as a blow to Bruce, who has seen his keeper's time at the Stadium of Light punctuated by a catalogue of fitness problems.[LNB]And the absence of Gordon from their curtain raiser with Birmingham on 14th August has left the boss reeling.[LNB]Bruce, currently in Portugal with his players for a pre-season training camp, told the club's official website: "It was devastating - a complete freak accident.[LNB]"It happened just when we had Craig at the top of his game and he will be a big miss for us.[LNB]"It's a big blow, but we will have to get over it. Every club has its knocks over the season. Craig needs a bit of luck and we wish him well."[LNB]The injury to the 27-year-old leaves Bruce with a gap to plug in the short term and it remains unclear whether he will make an unplanned dip into the transfer market.[LNB]Bruce already has three other shot-stoppers on his books in the form of rookie Trevor Carson, new recruit Simon Mignolet and Marton Fulop.[LNB]Fulop's future is unclear after rumours suggested the Hungarian would leave Wearside in the summer but Bruce is confident his back-up keepers can provide sufficient cover.[LNB]He added: "We have got plenty of competition. [LNB]"Young Simon has come in and Trevor has played in pre-season and done very well, plus there is Marton Fulop, who is with us for the time being."