Lewis Hamilton has pulled out of a tyre test in Barcelona to rest a sore foot ahead of next week's US Grand Prix in Austin.

The triple world champion was due to test the 2017 Pirelli tyres with a modified 2015 'mule' car but teammate and championship leader Nico Rosberg took on those duties instead.

A team spokesman says the Brit had some discomfort in his foot after training and it was agreed he could rest it to be in good shape for Austin.

The spokesman insists Hamilton will be fine to race next week.