Tennis began life as one of many boy-girl duos making lo-fi pop music, but on the day that they release their more mature sophomore album Young & Old they show up at the Hoxton Bar and Kitchen as a four piece: husband and wife Patrick Riley and Alaina Moore are joined not only by a drummer but also by an additional keyboardist. They're thus fully equipped to translate Young & Old's more developed sound to the live setting – and Moore comments that she's pleased they now have enough material to play for longer than a half hour set.

They start of slowly but steadily, interspersing their new tracks with the more familiar material from their debut Cape Dory. For the most part, it's the newer songs that work better: they're not just fresher, but generally stronger. Nonetheless, it's Cape Dory's best track, 'Marathon', that seems to really bring the room round to Tennis' side (though having said that, one suspects that this might not be a musically attuned audience in search of a challenging new sound: when Moore asks the soundman to turn her keyboard up a few dBs, every other person in the crowd seems to turn to their companions and ask what dB stands for).

With Moore singing from behind a keyboard at one side of the stage, and a Hammond on the go on the other side, the swirling organ sound that characterises Tennis' work is fully realised, leaving Riley to fill in the melodic spaces with his guitar. The fact that they haven't added a bassist to their touring line-up is a nice touch, proving that this is a band who can devise their own workarounds. If one of the keyboards isn't providing a bassline, then Riley is plucking one out on the lower strings of his guitar.

Young & Old arrived only a year after Cape Dory, and further evidence that Tennis are no slouches when it comes to writing new material comes in the shape of a brand new song, whose title we are not told. This is probably the most ambitious moment of the set – overambitious at times. There's an awful lot going on in the new song, and it seems as though a concerted effort has been made to make broad keyboard strokes, jangly guitars and a large helping of soulfulness coalesce – perhaps an unworkable combination. Still, it's got a fine chorus that allows Moore to show off her voice, so with a bit of work it could be a keeper.

A defective keyboard doesn't stop Tennis from bringing the set to a smooth conclusion. Clearly they have the ability to deliver a cool and confident live show, and with Young & Old they now have a rich seam of raw material. If they can continue to make turning out sunny three minute pop tunes look this easy, then it should be a case of game, set and match.