Medvedev has thrown a curve ball, says McEnroe

FILE PHOTO: Tennis - ATP Cup - Ken Rosewall Arena, Sydney, Australia - January 11, 2020. Russia's Daniil Medvedev in action during his Semi Final singles match against Serbia's Novak Djokovic REUTERS/Ciro De Luca/File Photo

(Reuters) - Russian Daniil Medvedev is the most likely player to break the Grand Slam stranglehold of the "big three" when the Australian Open starts in Melbourne next week, according to John McEnroe.

The 23-year-old's quirky style propelled him to four titles and a Tour-leading 59 match wins in 2019 and McEnroe says he provides different challenges to the old guard.