Sinner puts heat on Alcaraz in world No 1 race at Monte-Carlo Masters

"I'm going to lose the number one spot" - Carlos Alcaraz admits his defence of the top ranking spot is in danger this week at the Monte-Carlo Masters with Jannik Sinner chasing him down.

Sinner made an impressive return to European clay by winning an 18th consecutive match - and also making it 36 successive sets - at Masters 1000 level with an opening victory.