Lorenzo broke the small but notoriously slow-to-heal scaphoid bone during a training fall just outside of Verona, Italy.
According to Repsol Honda, ‘Lorenzo elected to have surgery’ which took place today (Monday) and involved ‘a titanium screw inserted via a minimally invasive technique’.
That leaves only the second and final pre-season test, in Qatar from February 23-25, before Lorenzo’s Honda debut at the season-opening night race on March 10.
The former Ducati rider missed four of the last five rounds of 2018 after suffering a crack to the radius bone of the same left wrist, when he was thrown off by a technical problem during practice at Buriram.
Lorenzo’s training accident means both Repsol Honda riders are currently recovering from surgery, with reigning five-time MotoGP champion Marc Marquez undergoing a shoulder operation in early December.
And with LCR’s Cal Crutchlow still healing from last season’s serious foot injuries, team-mate Takaaki Nakagami is currently the only fully fit Honda MotoGP rider. Crutchlow is aiming to ride at Sepang, which would be his first laps since Phillip Island in October.
A victory for Honda would make Lorenzo only the fifth rider in history to win premier-class races for three different manufacturers, after Mike Hailwood, Randy Mamola, Eddie Lawson and Loris Capirossi.
Marquez and Lorenzo were a close third (+0.025) and fifth (+0.160s) fastest, respectively, during the final MotoGP test of 2018 at Jerez.