TN Sub Grappling Open Mat- 自由對打無道服降伏
無道服降伏-無道服降伏課程是巴西柔術的另一種形式，在無道服的情況下練習地面技術。 通常穿緊身運動上衣及短褲訓練。 無道服課程不包含打擊技術，主要以多種地面降伏技術以及控制教學。
Sub Grappling – Submission grappling is a form of BJJ in which we try to use the techniques of BJJ but while we are not wearing the gi. A tight fitting shirt and shorts are usually worn. There are no strikes during submission grappling but all submissions can be used.