The Guardian | Roger Federer beats Jack Sock at ATP World Tour Finals – as it happened The Guardian Time to wrap things up, but stay tuned for Kevin Mitchell's match report in due course. Roger Federer is up and running, and Rafael Nadal will be competing. The World Tour Finals are hotting up nicely already. Thanks for joining me. Bye! Facebook ... Roger Federer vs Jack Sock AS IT HAPPENED: Federer wins ATP World Tour Finals opener Roger Federer defeats Jack Sock in opening match at ATP Finals in London World Tour Finals WAGs: Meet the HOT tennis partners cheering on Nadal & co |