Oleg KarpovF1 needs radical points change to stop limp endings OPINION: For a third year in a row, the F1 title has been decided earlier. That's only going to happen more often as the calendar grows, so something needs to change 1573689600 F1

David EvansEveryone loses if Citroen's WRC pullout goes ahead Citroen looks likely to quit the World Rally Championship - a series it dominated for years - with immediate effect. It's a sad end to a poor era for this once-great team, and a massive blow to the series 1573689600 WRC

Lewis DuncanFrom unsettling Rossi to back of the grid ignominy Jorge Lorenzo will be leaving MotoGP at the end of a terrible season - one that does his achievements no justice. Here is the story of his career decline, and why he should be remembered for his highs 1573689600 MotoGP

Gary WatkinsRebellion win a hollow triumph for imperfect WEC rules Though Rebellion broke Toyota's stranglehold on the WEC at Shanghai, the series just swapped domination by one car for domination by another. The handicap rules are creating variety but not decent racing 1573603200 WEC

David EvansThe agonising situation the WRC faced in Australia As bush fires devastated the region surrounding the Coffs Harbour area hosting Rally Australia, WRC took the decision to cancel the event. But why did that decision take so long? 1573603200 WRC

Autosport PerformanceHow a Formula 4 underdog is taking on the big guns By Stephen Lickorish The margin between success and failure in Formula 4 is tiny, but JHR Development's investment in a bespoke Pro-Sim racing simulator is helping tip the balance in its favour 1573603200 Performance

Ask Gary AndersonWill Wolff's absence affect Mercedes in Brazil? By Gary Anderson What impact will the absence of Toto Wolff have on Mercedes in Brazil? Should F1 switch to biofuels? Would Eddie Irvine have been a deserving or flukey world champion? 1573603200 F1

Autosport EngineeringWhy motorsport's latest innovation can emulate Formula E By Lucas di Grassi Extreme E, the new electric off-road series, is heading into unchartered territory - literally. But our columnist argues that it can take inspiration from Formula E's success and even match it for impact 1573603200 Engineering