The host's efforts paid off with 17 minutes played as Mainz' Leandro Barreiro fouled onrushing Dani Olmo inside the area. Forsberg broke the deadlock with a well-placed shot from the spot into the bottom right corner.
The weekend now kicks off on Saturday lunchtime with Alaves looking for their first point of the season when they entertain an always complicated Getafe, who are coached by former Alaves boss Jose Bordalas.
Local cyclists prevailed in all categories, with Liang Shizhong and Huang Shihai winning the men's title in 14:02:17, Che Ruirui and Chen Hongyu taking the women's title in 16:45:04, and Song Hanbing and He Huaisong triumphing in the mixed category in 16:02:34.
Selby had smashed Ding 5-1 in the quarterfinal before defeating Murphy 6-3 to reach his 27th career ranking final.
Napoli also got their new season off to a good start as the Coppa Italia holder dominated Parma 2-0 with Dries Mertens and Lorenzo Insigne on target.
Philippe Coutinho also has a lot to prove after his loan spell at Bayern, while questions remain over what style of play Koeman will look to impose.
Villarreal came back from a goal down to take their first win of the season with a 2-1 at home to Eibar.
"I know that this cruel loss has brought immense sorrow and I would like you to know that the African football fraternity shares in this pain," Ahmad added.
West Brom have had a difficult return to the top-flight, conceding eight goals and scoring just two in their opening games, and things may not get much easier when they entertain Chelsea this Saturday. West Brom acted to shore up their defense in the week with the signing of former Chelsea legend Branislav Ivanovic and the man who played 377 times for the 'Blues' could go straight into the 'Baggies' starting 11 on Saturday.
This Friday saw Messi publish a 'goodbye' letter of Suarez, his friend and strike partner for the past six seasons, who this week signed for Atletico Madrid after scoring 198 goals for the club.
In Group D, Al Sadd SC tied Al Nassr 1-1 and both made it to the Round of 16 after Sepahan settled for a 0-0 draw with Al Ain in Monday's late match. Enditem