Why are so many British players injured?

Of the six British singles players who began the year in the top 100, Cameron Norrie is the only one to have avoided injury or illness, and he has returned impressively to the world's top 20 in recent weeks. Raducanu, 23, had been due to return at the Italian Open in Rome this week but withdrew after her media commitments on Tuesday with post-viral symptoms. Kartal is currently on track to reappear during the grass-court season, but the back injury the 24-year-old suffered during her run to the Indian Wells fourth round in March has cost her the entire clay swing. Francesca Jones had a month out after a glute injury at the Australian Open and Draper's comeback from his serious arm injury has been checked by a knee problem , while Fearnley came through qualifying in Rome after a seven-week absence. British number three Katie Boulter, who tumbled out of the top 100 last year as she battled foot and hip injuries, says it can be hard to step away even if players have information to suggest their bodies are at breaking point. Fitness trackers, which offer performance analysts a wealth of data, will be allowed on a trial basis at this year's remaining three Grand Slams, as they have been for a while now on the men's and women's tours. But Boulter, who has climbed back into the top 60, told BBC Sport: "I think it's impossible as a tennis player to be like, 'I'm going to take the week off because my wearable [device] says that I'm in red'. …