By Neil Morrison
As this season has demonstrated, there are times in every professional rider's career when they have to grit their teeth and ignore what their injured body is telling them..
All three of this year's MotoGP rivals - Marc Marquez, Dani Pedrosa and Jorge Lorenzo - have already done just that at least once so far this season.
Lorenzo was the first to show off incredible toughness in 2013, racing at Assen less than 48 hours after breaking and then undergoing surgery on his left collarbone, finishing fifth. He then made another early comeback at Laguna Seca after re-damaging the collarbone at the Sachsenring.
Pedrosa meanwhile had fractured his collarbone in Germany, but was also back on track the following weekend in California.
Then came Marquez's Silverstone injury, in the form of a dislocated shoulder in morning warm-up. It looked like the rookie could well miss the race, and surely surrender a chunk of his championship lead.
Instead, the shoulder was painfully popped back into place at the Medical Centre and four hours later Marquez was standing on the podium, having battled Jorge Lorenzo for victory to the final turn.
To celebrate these acts we have chosen six other examples of injured premier-class riders fighting against the odds and overcoming them…
Barry Sheene – Cadwell Park 1975 – Broken left leg and thigh, broken right wrist, forearm, collarbone, broken six ribs
Barry Sheene had always shown a particularly high pain threshold. Phil Read recalls how he was astonished when Sheene revealed he'd cracked his wrist and vertebrae in his back that day while the pair were out on the town. “You wouldn't know he'd hurt himself,” he said. Or the time Sheene sported sunglasses at a meeting to hide a bloodshot eye caused by internal haemorrhaging, acting like nothing had happened.
But the stories come no more famous than his recovery from the 175mph Daytona spill in 1975, the event that cemented his place in the British public's consciousness.