British number two Cameron Norrie struggles to find his rhythm and falls to a straight-set defeat against Monaco's Valentin Vacherot at the Paris Masters.

Carlos Alcaraz arrived at the Paris Masters in rich form but the Spaniard's campaign in the French capital came to a close much quicker than anyone expected after Britain's Cameron Norrie pulled off a 4-6 6-3 6-4 upset.

Former TCU tennis star Cameron Norrie picked up what he called the best win of his career Tuesday, beating the world’s No. 1-ranked player, Carlos Alcaraz, 4-6, 6-3, 6-4 in the second round of the Paris Masters.

Jannik Sinner has a clear path to another Masters 1000 title after Carlos Alcaraz was knocked out early in Paris. Alcaraz had nothing but praise for Cameron Norrie after his defeat, and with the defending champion now out,

Carlos Alcaraz suffered an early loss at the Paris Masters, losing to Cameron Norrie 4-6, 6-3, 6-4 in two hours and 22 minutes. It was the Spaniard's worst performance since March. Despite winning the opening set, he never felt comfortable on the court, hitting without confidence and missing a chance to seal the year-end no. 1 battle.

Carlos Alcaraz thought he would perform much better in his first official tournament in indoor conditions since February, but his run at the Paris Masters 1000 ended in the second round against a deluxe version of Cameron Norrie.

The world No. 1 was asked for his thoughts on the "ideal number" of matches a top player should play in one season ahead of his opening match at the Rolex Paris Masters.

Novak Djokovic is not involved in the Paris Masters, having decided to skip the event for the second year in a row.