South Africa skipper Temba Bavuma hit a defiant 55 not out in his team's second innings total of 153.

The Spaniard has had the better of his clashes with Sinner 10-5, and has won four of this season's five meetings which have all come in the final of top-level tournaments.

That commanding victory left Spain with a three-point lead over Turkey at the top of Group E and a vastly superior goal difference.

Sinner has won his last 18 sets played in Turin, where he beat Taylor Fritz in last year's final. The four-time Grand Slam champion is on a 30-match winning streak on indoor hard courts.