Marc Marquez back on track at Portimao to step up MotoGP return preparations

The six-time MotoGP world champion has been out of action since suffering concussion in a motocross training incident in November which triggered a return of a double vision – or diplopia – he previously had in 2011 after a Moto2 crash.

After missing the final two rounds of the 2021 MotoGP campaign and the post-season test, Marquez was allowed to return to motorcycling training…