Spain's Carlos Alcaraz suffered a shock 6-1 7-5 defeat against Norway's Casper Ruud in his opening match at the ATP Finals as his hopes of winning the year-end title for the first time suffered a big blow on Monday.

Carlos Alcaraz looked little like the player who won two Grand Slams this year in a 6-1, 7-5 loss to Casper Ruud at the ATP Finals.

Out-of-sorts Carlos Alcaraz shocked by Casper Ruud in John Newcombe Group; watch all the action from the ATP Finals in Turin on Sky Sports Tennis and Sky Sports+ which is integrated into Sky TV, strea