In a move that’s sent ripples through the tennis world—or at least through the very specific, tea-sipping corner of it that obsesses over British tennis—Jack Draper has decided to shake things up. The British No. 1 has brought in Jamie Delgado, a name synonymous with Andy Murray’s golden era, as his new lead coach. Let that sink in. This is like your favorite indie band suddenly hiring the producer behind a multi-platinum rock album. It’s a big deal.

For those of you who’ve been following Draper’s career, you know it’s been a rollercoaster of soaring highs and gut-wrenching lows. The guy has a game that can make your jaw drop—a lefty serve that’s pure venom and a forehand that could punch a hole through a brick wall. But his body? It seems to be made of something far less durable. Glass,

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