At least Laura won twice as many games as her last doubles in the US Open. It must be quite difficult for her as her rankings mean she can only ever play doubles at Grand Slams and UK based events (with a WC) so she ends up playing in scratch pairings with very little doubles practice.
Heather and Marina have shown themselves to be a very effective pairing so far, but I wonder how motivated Heather will be for this match having played two long singles matches, and with a match against Radwanska coming up.
Heather is perhaps trying to outdo her first two singles comebacks. With Marina, she's now a set & 3 breaks down to the little and large pairing of Groenefeld & Peschke 4-6 0-5 The glorious fightback surely begins now!