even after 90 minutes of playing opposite each other 
(ROOT (PP (ADVP (RB even)) (IN after) (NP (NP (CD 90) (NNS minutes)) (PP (IN of) (S (VP (VBG playing) (PP (IN opposite) (NP (DT each) (JJ other)))))))))
(ROOT (PP (ADVP (RB )) (IN ) (NP (NP (CD ) (NNS )) (PP (IN ) (S (VP (VBG ) (PP (IN ) (NP (DT ) (JJ )))))))))