The Belgian then played a major role in the second goal in the 33rd minute, setting up Raheem Sterling, whose ball into space was put into the empty net from 10 yards by Phil Foden.
The "Bulls" staged a powerful start on home turf and pressed the "Nullfunfer" onto the back foot.
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.
But he has fallen out of favor under Atletico's current manager Jorge Sampaoli and has not played for the club since March.
It has a decent record against Real Madrid with two wins and a draw in their last three games, the last of those being a 2-1 victory in the Benito Villamarin stadium. Nabil Fekir is fit to start and will probably play alongside Borja Iglesias and Sergio Canales. Enditem
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.
Both sides started highly motivated as Leverkusen took over, whereas Wolfsburg focused on turnovers and fast breaks. However, both teams lacked in accuracy.
Wuhan posted more threats than Chongqing in the second half, but they didn't take their scoring opportunities. What's worse for Wuhan, French midfielder Eddy Gnahore was sent off in the 76th minute after he received a second yellow card for his foul on right-back Jiang Zhe.
The win was a relief for the German coach and the struggling defending champions as they have scored only one goal in the opening three games, which was the worst record for the capital club since the 1984-1985 season.
RIO DE JANEIRO, Sept. 21 (Xinhua) -- Teenage Botafogo forward Luis Henrique Lima is close to joining Olympique de Marseille, according to reports in the Brazilian press.
After the restart, Desna took control and should have restored parity in the opening stages of the half as Guilavogui blocked Vladislav Kalitvintsev's rebound from inside the box on the goalline.