The three-time major champion has gutted out two surprising victories and played more than 10 hours of tennis en route to the third round. How much further can he go?
Jon Wertheim: This marks the fourth anniversary of Andy Murray's quasi-retirement. His cheerful exit from the 2019 Australian Open, when the tournament went so far as to produce a farewell video, well…how silly that looks today. Murray never formally retired. He underwent a hip resurfacing procedure and struggled to return. But now, four years later, he’s still going. He won a first round match that spanned nearly five hours.