Mercedes driver Lewis Hamilton pulled out of the Pirelli F1 test in Abu Dhabi on Tuesday after feeling unwell.
The Briton, who won the Yas Marina race on Sunday but lost the championship to teammate Nico Rosberg, had joined the test to work on Pirelli's 2017 Formula 1 tyres.
Hamilton was not scheduled to drive today, with Pascal Wehrlein expected to be in the Mercedes cockpit, but Pirelli announced a change of plans this morning.
The German was scheduled to take over from Hamilton in the afternoon.
However, Hamilton was replaced by Wehrlein early as he was not feeling well after a few runs.
The test is the final one Pirelli is carrying out to evaluate next year's wider tyres.