 He achieved his best finish of the season at the 2013 Monaco Grand Prix, when he finished in 14th place following several retirements.He achieved his best qualifying result of 16th position at the 2013 Belgian Grand Prix in a mixed-weather session where he was one of three drivers to go out on slick tyres at the end when the track's condition was improving.Chilton is the only driver to have finished every race of his rookie season.