Answer
Berdych's longest doubles match was a grueling encounter against the formidable pairing of Stan Wawrinka and Marco Chiudinelli. The match, an exhibition event held in Prague in 2013 as a part of the inaugural edition of the IPTL, tested the endurance and resilience of all the players involved. It stands as a testament to the intense competition and unwavering determination showcased on the court during that memorable event.