In the wake of a series of unexpected defeats, Novak Djokovic has offered his most candid remarks yet regarding the potential nearing of his professional tennis career's conclusion.

Novak Djokovic has had a lengthy career of dominance. He's won every significant title and has the most Grand Slams of all time. But nothing lasts forever. The Serbian suffered a 6-3, 6-4 loss to Matteo Arnaldi at the Madrid Open on Saturday.

Novak Djokovic has confessed that he may have just played his last match at the Madrid Masters after falling to Matteo Arnaldi 6-3, 6-4 in the second round. The Serb has now lost his opening match at four of his last five events – with the exception being a run to the final at the Miami Open.