Unlikely triumphs have been a constant theme in football throughout 2016.
Leicester City winning the Premier League and Portugal lifting Euro 2016 are unquestionably the two standout achievements, and it will probably be some time before the world sees anything like them again – especially in the same year.
While the last 12 months of football have provided some lasting memories, tennis has recently served up a story to rival the aforementioned fairytales.
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Argentina have won their first Davis Cup title after toppling Croatia at the Arena Zagreb on Sunday thanks to brilliant performances from Federico Delbonis and Juan Martin del Potro.
The former may have clinched the deciding match 6-3, 6-4, 6-2 over Ivo Karlovic on Sunday, but Del Potro is the one who represents the magic behind their historic win.
The 28-year-old – who has undergone four surgeries for a recurring wrist problem since 2010 – levelled the tie at two wins apiece through a gruelling five-hour win from two sets down against Marin Cilic.
With Diego Maradona watching on from the stands, his comeback win is the all more stunning considering he picked up a finger injury while trying to catch a ball during the fifth set.
"I was calm, I hoped all the time that I could win and I did it," he said, per ESPN, displaying a bandage on his little finger on his non-racket left hand.
Del Potro had failed to reach the quarter-finals of any grand slam since 2012 until the 2016 US Open – but hopefully clinching the Davis Cup will signal the beginning of an injury-free run for the towering Argentine.
His immense contribution to the win has drawn praise from all corners of the tennis world, with several high-profile stars passing on their congratulations to not only Argentina, but Del Potro in the particular.
One only needs to have watched his semi-final victory over top-ranked Andy Murray to understand there is every chance Del Potro will be a force to reckoned with once again, providing he remains fit.
Professional sport is cruel by nature, but fans around the world be hoping the 41st-ranked Argentine can return to his best.