"It's really a tough and close match," said spiker Zhang.
Milan doubled the lead four minutes after the break as Ismael Bennacer was charged down by Riccardo Orsolini in the box, Ibrahimovic stepped up to convert the penalty.
The WTT Champions Series will also see players battling for prize money and ranking points in their attempt to reach the WTT Cup Finals.
Wander Helder scored twice for Leeds and Aleksander Mitrovic scored twice for the home side, who fought back from 4-1 down to give Leeds a nervy last 25 minutes.
The 16-team CSL was split into two groups, with 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.
The construction of the National Biathlon Center and National Cross Country Center in Chongli for Beijing 2022 were completed as planned.
Martinez's side are tight in midfield and defense, really dangerous from set pieces and have the experienced Roberto Soldado in attack; this week they have shown last season was no fluke. Enditem
It was Suarez's move to Atletico Madrid this week that led to Lionel Messi writing a 'goodbye' letter to his friend in which he accused Barca's directors of 'throwing out' Suarez, adding that "nothing surprised him". All this comes after Messi's failed attempt to leave Barcelona himself this summer, which ended with him accusing club president Josep Maria Bartomeu of going back on his word.
Kepa is under ever-increasing pressure after making the latest in a series of errors in Chelsea's 2-0 defeat at home to Liverpool on Sunday.
Ireland's Sam Bennett won the last stage after the eight-lap dash around the iconic Champs-Elysees to take the green sprinter's jersey.
The road so far has been far from easy, especially given the difficulties created by the global COVID-19 pandemic, which "brought an extra load and challenges" for the organizers, who spared no effort delivering on their promise of a 'green, inclusive, open and clean' Games.