Georges St-Pierre says contractually he must defend middleweight title if he beats Michael Bisping

Georges St-Pierre will likely fight Robert Whittaker next if he beats Michael Bisping.
GSP told Ariel Helwani on Monday’s edition of The MMA Hour that contractually he must stay at middleweight and defend the title there if he beats current champion Bisping at UFC 217 on Nov. 4 in New York. Whittaker, who is injured, is the interim middleweight champion and in line to unify the titles once he is healthy.
“I have to defend my title,” St-Pierre said. “It’s written in