Pat Martino never played in Britain until 2001, by when he was 56 years old. The mercurially agile jazz guitarist had good reason to stay at home in Philadelphia: he lost many career years learning the guitar all over again after a brain aneurysm wiped his memory of how to play. But if there is anyone who could be said to have forgotten more than most musicians ever learned, it is Martino, who plays so much guitar that it borders on the uncanny.

On his 2001 trip, Martino worked in a straightahead, blues-rooted Hammond organ trio. For his current week at Ronnie Scott's, the guitarist is operating in the quintet setup he used on his excellent recent album for Blue Note, Think Tank. The raw-toned tenor saxophonist Michael Pedicin is not quite a substitute for the album's more unpredictably lyrical Joe Lovano, but young pianist Frank LoCrasto is a real find - an unerringly decisive performer of storming inventiveness, inspired by McCoy Tyner.

Drummer Scott Robinson took a seamlessly furious percussive approach, unleashed in the band's fast opener, with its howling, guttural tenor-sax sound contrasting with the muffled chatter of the leader's long runs and snappy chordal accents. LoCrasto never wavered from the driving tempo in the startling wake-up call of his first solo, and Martino confirmed what an expressive ballad player he is on the slow feature that followed. Like Pat Metheny, Martino lightens the density of note-packed fast-bop lines with a variety of loop-like phrases and bluesy chord diversions. He was at his most resourceful on a dark, uncharacteristically slow-paced account of John Coltrane's Impressions.

· Until Saturday. Box office: 020-7439 0747.