While Djokovic is assured of his place in the eight-man London line-up , his compatriot Janko Tipsarevic is still fighting to earn one of the remaining two berths at the season finale . Richard Gasquet 's loses to Sam Querrey in his opening match at the World Tour Finals . Serbian star will still become new world No.1 despite defeat . Serbian Querrey recovers after losing first 18 games , firing 18 aces . Richard Gasquet 's hopes of reaching Japan finals end with defeat .
Richard Gasquet 's loses to Sam Querrey in his opening match at the World Tour Finals . Serbian star will still become new world No.1 despite defeat . Serbian Querrey recovers after losing first 18 games , firing 18 aces . Richard Gasquet 's hopes of reaching Japan finals end with defeat .