The medium is still too new to be able to point at a reliable set of results, we have no way of knowing how the advertising works over a worthwhile period of time, so any successes or failures that we have so far are purely anecdotal.

FORBES: GM Doesn't "Like" Facebook, Drops Ads

France had not had it all their own way - the Spaniards took the doubles into a fourth set having saved a match point in the third set tie-break.

BBC: France beat Spain to secure Davis Cup semi-final spot