I have also witnessed a player reacting to his opponents intentional and illegal blocking by deliberately hitting him with the ball as hard as he could during the course of play.
分析主干:I have (also) witnessed a player reacting
reacting 在句中是现在分词,作宾语a player 的补语;by…hitting…是reacting 的方式状语,hitting 作介词by 的宾语。as hard as he could 是比较结构,表示“尽力”。
译文:还有一次我看到过一个球员在比赛中因为对方的一个有意犯规阻挡,而故意使足了力气把球砸向对方。