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What did Steffi Graf play?
professional tennis
what was Steffi Graf's play style?
The main weapons in Steffi Graf's game were her powerful inside-out forehand drive and her intricate footwork.
what else represented Steffi Graf's play style besides her powerful inside-out forehand drive and her intricate footwork?
Steffi Graf often positioned herself in her backhand corner although this left her forehand wide open and vulnerable to attack.

Question: why did she use this style?
Self-contained rewrite: why did Steffi Graf use this style if positioning herself in her backhand corner left her forehand wide open and vulnerable to attack?