Frankie Chili will miss the two WSBK races in South Africa after suffering a broken collarbone in a warm-up crash at Kyalami.

The Italian came to grief after an on-track altercation with works Ducati rider Ruben Xaus during the final pre-race session, when both riders appeared to misunderstand the other's intention heading into Nashua corner.

With Chili slowing momentarily to check who was behind him, Xaus pushed his Infostrada machine inside the black NCR privateer Ducati, only for Chili to speed up, causing both bikes to make contact and crash. Chili, the series veteran, was pitched over the front of his bike, landing heavily on his left shoulder. He was later diagnosed with a break in the collarbone beyond the extent of the plate fitted to repair a similar injury last season.

The Italian will now undergo another operation next week and, despite the break, expects to be back in action at his home race at Monza next month.

Xaus escaped unscathed from the incident, which was later written off as a racing incident by the stewards.