(REUTERS) – Formula One’s post-season shake-up took another spin on Tuesday (December 20) as Valtteri Bottas moved closer to Mercedes and Felipe Massa’s retirement looked to be coming to an end. Canadian Lance Stroll, still just 18, will be making his race debut but his team mate remains uncertain following the surprise retirement of Mercedes’ newly-crowned world champion Nico Rosberg. Bottas, who has been at Williams since 2013, is the favourite to replace Rosberg as […]