Felipe Massa is not commenting on whether his retirement is about to be put on hold.
Massa's former Williams team mate Valtteri Bottas is expected to move to Mercedes to replace the recently-retired Nico Rosberg, with Massa the number one candidate to step in for the Finn.
But after playing in a charity football match in Sao Paulo, Massa refused discuss the speculation.
"I'm just going to enjoy my vacation, and that's it," he is quoted by Brazil's UOL Esporte.
Bahrain International Circuit - Winter testing