Selby had smashed Ding 5-1 in the quarterfinal before defeating Murphy 6-3 to reach his 27th career ranking final.
Everything changed after the break with Son latching onto another Kane through ball in the 47th minute to put his side ahead, before adding two more in the 64th and 74th minutes.
Ibrahimovic had the chance to complete his hat-trick in the 63rd minute, but he ballooned the ball over the bar with the goalkeeper well beaten.
Last week, second division striker Philipp Hoffmann refused to play for his team Karlsruher SC after he had told the club his plans to join Union Berlin.
Having returned to the Merengues on a buy-back clause in 2016, Morata then joined Chelsea before a move to Atletico Madrid in January 2019.
Speaking ahead of his side's Carabao Cup game against Barnsley on Wednesday, Chelsea coach Frank Lampard said that former Chelsea goalkeeper Petr Cech, who is now a technical and performance advisor at the club, had been instrumental in the signing.
The league debut comes after another difficult week, which followed a complicated summer in the wake of Barca's 8-2 thrashing to Bayern Munich in the Champions League. That defeat saw Quique Setien sacked as coach and replaced by Koeman and led to a clear out of the dressing room, which has so far seen Ivan Rakitic, Arturo Vidal, Arthur Melo, Nelson Semedo and Luis Suarez all leave the club.
It took the Argentinian giants until the 87th minute to break the deadlock at the Atanasio Girardot stadium as former Atletico Madrid winger Eduardo Salvio struck his fifth goal of the campaign.
The two sides fought hard in the first half, before the former overcame the scoreless drought in the 43rd minute as star player Alex Teixeira knocked in a rebound after his header was denied by goalkeeper Liu Weiguo.
The 16-team CSL was split into two groups, each group of eight teams based respectively in Dalian and Suzhou. Both groups will play 14 rounds in the first phase, which is to end next Monday.
After a goalless first half, Chengdu's Lu Weiyang broke the deadlock with a powerful shot from outside the box in the 61st minute. Brazilian striker Leonardo extended the lead 10 minutes later.