This content is not available in your location.
There was an error
Jannik Sinner says Alexander Zverev can be a Wimbledon champion soon and promises to "be very, very careful" as the German challenges his world number one status, following a four-set win for Sinner in the final of the grass-court Grand Slam.
Available to UK users only.
Related topics
Tennis Follow Tennis close panel You are now following Tennis Updates from your Sport topics will appear in My Sport and in a collection on the Sport homepage .