Hamilton, 34, has a contract with Mercedes until the end of 2020, by which time he could have equaled Ferrari great Michael Schumacher's unprecedented seven titles and broken other records. "You have to simply acknowledge that probably it’s in every driver’s head to drive at Ferrari one day," Wolff told reporters at the Spanish Grand Prix. "It’s the most iconic, historic Formula One brand out there and I totally respect if a driver has the desire to drive at Ferrari.