“Del Potro and Biedert had been in contact since January,” Del Potro’s team wrote in a statement on Twitter. “In recent months, Delpo followed his doctors’ advice and even tested the knee on a tennis court in Buenos Aires, but the pain persisted. After their first meeting in Bern, Biedert recommended a new surgery.”
The 31-year-old Argentine has also had several wrist surgeries: one on his right wrist in 2010 and three on his left wrist in March 2014 (joint), January 2015 (ligament) and June 2015 (tendon). Del Potro overcame that adversity, reaching a career-high World No. 3 in the FedEx ATP Rankings in August 2018.