Final practice for the Formula One Grand Prix was twice delayed on Saturday due to smog shrouding the circuit and preventing the medical helicopter from operating.
Red Bull's Sebastian Vettel completed a practice hat-trick on Saturday with the fastest time in a smog-shortened final session before qualifying for a race expected to bring him a fourth successive Formula One title.
A deal has been done for India to return to the Formula One calendar in 2015 and for six years beyond that if tax problems with the country's authorities can be overcome, commercial supremo Bernie Ecclestone said on Saturday.