Nadal, and his foot, under scrutiny as he chases 3rd Wimbledon title

Until a few days ago, very few people had even heard of 'radiofrequency ablation treatment' - a procedure which uses heat on the nerve to quell long-term pain. But it is thanks to that procedure, which the 36-year-old had earlier this month to treat a degenerative condition that affects the bones in his feet, that he is able to turn up at the All England Club ready to target Grand Slam title number 23.

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