The "Bulls" caught a perfect start on the road as they marked the opener with fortunate assistance from goalkeeper Christian Mathenia, whose misplaced pass allowed Haidara to make it 1-0 with just three minutes played.
Evergrande doubled the lead in the 69th minute with a stunning free kick from Ai, two minutes after his tap-in was ruled out due to off-side.
Thiago Silva and Ben Chilwell should strengthen an at-times questionable back line, while Timo Werner and Kai Havertz are big money additions at the other end of the field and overall Lampard can be happy with his summer.
The bad relationship got worse last month as PSG went all the way into the Champions League final, which previously was an honor exclusively belonging to Marseille.
Saturday ends with newly-promoted Cadiz, who on Wednesday drew their last friendly of the summer 1-1 with Almeria, at home to Osasuna.
Messi last week said he'd stay, but made it clear he was unhappy with both club President, Jose Maria Bartomeu, and the failure to develop a balanced squad and he could be an awkward dressing room presence for the new coach.
Bahia are currently 13th in the 20-team Serie A standings with just two wins from seven matches.
Stage One will be played across two blocks of eight days: September 13-20 and September 28-October 5. Enditem
Elsewhere, Sheffield United impressed in their return to the top-flight last season and now need to repeat that in what could be a tough second season, Burnley will continue to present teams with a physical challenge under Sean Dyche, while Danny Ings' goals will play a major role in determining Southampton's fate.
"We have extraordinary challenges ahead of us this season, and it will be a pleasure and an honour to face them alongside my new teammates, who are among the best players in the world," he added.
Marinho has now netted seven goals and provided three assists from 10 league matches this season.