Xfire added support to TE2013 with its yesterday update, but it's kinda buggy ; I'm going to contact Xfire team to see what can be done.
if you take the ball early, it'll have less topspin than before, but still have some noticeable amount.
EDIT: after further checking, the topspin is capped to its minimum on almost all raising balls, I'm going to fix that so it'll be more progressive.
I'll report your issue to them and see what they can tell me about it ; for me, it makes the game crashes on exit, and TE can't detect Xfire (I suspect their Sdk doesn't work with the v2 of Xfire).
== Mana Games ==
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