He overcame the fifth - seeded Andy Roddick in a battle that lasted almost five hours .
Djokovic faces Yen - hsun Lu of Taiwan tomorrow , the surprise winner of the latest of Wimbledon 's series of marathon matches .
Djokovic overcame the fifth - seeded Andy Roddick in a battle that lasted almost five hours .
Djokovic faces Yen - hsun Lu of Taiwan tomorrow , the surprise winner of the latest of Wimbledon 's series of marathon matches .