It was an unhappy return to action for Manx rider Peter Kennaugh who failed to finish La Fleche Wallonne in Belgium this afternoon.
Kennaugh - who rides for Team Sky, had been out of action with a joint injury.
Alejandro Valverde was the eventual race winner, recording his second successive victory at the one-day event.
Harrison wins fourth Southern 100 solo championship with new lap record
Kieran Clark and Rob Coppock claim second sidecar title of the week
Harrison wins Southern 100 Senior Race
Five races conclude after opening session of Championship Day
Championship day at the Southern 100
Nine races scheduled for final day of action at Billown
Gotland to host 2031 International Island Games
IIGA confirms plans following annual general meeting