Carlos Alcaraz suffered an unwanted Shanghai Masters surprise as he was handed a shock third-round defeat by Zizou Bergs to confirm Alexander Zverev as year-end world number 1.
Alcaraz won his 27th career title in Tokyo last week but was surprisingly lacklustre as world No 39 Bergs surged to a 7-5, 7-6 (4) victory over the seven-time grand slam champion.