Speculation around Rossi has swirled .
Speculation around Rossi became heightened in the offseason as fans wondered if Rossi would return to Formula One -- where he has served as a reserve driver for Manor Racing -- or remain in the U.S. open - wheel series .
Speculation around Rossi has swirled and became heightened in the offseason as fans wondered if Rossi would return to Formula One -- where he has served as a reserve driver for Manor Racing -- or remain in the U.S. open - wheel series .