Big changes are coming in Formula One in 2014. Not just the engines in the cars, but who will drive them for which teams.
With the 2013 drivers' and constructors championships wrapped up by Sebastian Vettel and Red Bull, Formula One heads into Sunday's U.S. Grand Prix in Texas and the final race next week in Brazil with an eye on next year.
Kimi Raikkonen is leaving Lotus for Ferrari. Ferrari's Felipe Massa is switching to Williams, where Pastor Maldonado is out.
Sergio Perez is out at McLaren, and Red Bull's Mark Webber leaves behind his frosty relationship with teammate Vettel by leaving Formula One to race with Porsche in the world endurance championship.
The sport is also changing from 2.4-litre V8 engines to a 1.6-litre V6 turbocharged unit.