Chennai Turbo Riders continued their relentless assault on the championship by clinching their fourth win of the season through veteran Britisher Jon Lancaster as the Round 4 of the Indian Racing League, promoted by Racing Promotions Pvt Ltd, got off a thrilling start at the recently upgraded Kari Motor Speedway on Saturday. The 35-year-old Lancaster produced moments of magic to hold off pole-sitter and former Formula 1 test driver Neel Jani of Hyderabad Blackbirds, returning to the Indian Racing League championship after missing the previous two rounds, in a tight finish. In P3 behind the two veterans was India's Sohil Shah of Goa Aces JA Races.