Despite his defeat, del Potro can console himself with the fact that he now has enough ranking points to have qualified for the 2018 ATP finals in London next month.
The 31-year-old Fognini, who is reportedly suffering an ankle problem, looks likely to also miss next week's Shanghai Masters.
Spanish doctor who stole newborn baby during Franco's rule avoids punishment
The statute of limitations imposes deadlines on courts to complete legal proceedings. Prosecutors had called for him to face an 11-year prison sentence.
Edmund was broken in the very first game of the match when he sent a forehand long but he pulled the break back in the very next game after a backhand mistake from Basilashvili. "I think that was the key".
Basilashvili remained resolute on his serve, never facing a breakpoint while aces rained down on him from Del Potro's end.Early in the opening set, Basilashvili took advantage of a lapse in concentration from Del Potro to take a 2-1 lead after which he consolidated.
He lost his own serve in the next game, but had further chances to draw level in a see-saw 10th, Basilashvili eventually sealing victory on his third championship point.