Seoul coach Choi Yong-Soo was sour with the referee\'s call on Suwon\'s winner in Monday\'s derby, but Bluewings boss Yoon Sung-Hyo told reporters \'real big clubs win these matches\'.Suwon Bluewings coach Yoon Sung-Hyo says FC Seoul \"should talk less and play more\" after the capital club\'s coach Choi Yong-Soo claimed Stevica Ristic\'s winner in Monday\'s heated 1-0 derby win was offside.A crowd of 44,000 fans flocked to the Big Bird Stadium to watch the clash between Korea\'s top big clubs who are situated only 30 kilometres apart.Suwon striker Ristic headed the decisive goal from a free-kick on 78 minutes, but Seoul boss Choi said television replays showed Park Hyun-Beom, who provided the assist for the Macedonian, was offside prompting Yoon to respond.\"Seoul should talk less and play more football on the pitch. The real big clubs win in these matches,\" Yoon told reporters.\"I\'m not sure about the about the offside claims. But it\'s a pity to say that after they lost the game.\"Choi had said: \"The goal by Stevo was offside. I watched the replay and it was an offside. All my players effort resulted in nothing. But this is football, we have to respect the refree\'s decision.\"We gave up the third position in the league to Suwon. It will be hard to get it back, but we will never give up.\"Suwon, who reached the Asian Champions League semi-finals in midweek, after third ahead of Seoul in fourth, with both clubs level on 48 points, but with Bluewings enjoying a marginally better goal difference.