Slovan's Brazilian striker Rafael Ratao had the biggest opportunity in the 41st minute when he found himself one-on-one with the goalkeeper but failed to take the clear-cut chance, instead, failing to square the ball to a teammate.
Jorginho opened the scoring for the Blues with a penalty in the 23rd minute after debutant Timo Werner was tripped by Brighton keeper Mat Ryan.
Gilbert and Lu met in the last match of the group both with one win and one draw. The world No. 11 won the final frame to draw 2-2 with Lu but advanced by claiming the highest break of 98.
Stage One will be played across two blocks of eight days: September 13-20 and September 28-October 5. Enditem
The second half witnessed breakthroughs in the final moments. In the 89th minute, Alan Douglas Borges de Carvalho fired a missile for Beijing after finding a gap between two defenders.
Eight minutes later, things went from bad to worse for Duisburg as Volkmer felled Erling Haaland as the last man to receive his marching orders.
"It was important for Pierre-Emerick to stay with us. He's a superb player with an incredible mentality. Being the player to have taken the least amount of time to reach 50 goals with this club tells you everything you need to know about him and his way of working."
"We are working hard for the new season and I think we will have the same group of players that we have now in pre-season," he commented.
Now, the 29-year-old says he is fully fit again and ready to shine for the Albiceleste, should he be given the chance.
Finland's six-time champions KuPS Kuopio will face the Lithuanian champions FK Suduva in the third round of the Europa League Qualifiers. Enditem
The pre-season has helped clear up some issues at Real Madrid, with Gareth Bale and Sergio Reguilon in London ahead of their planned moves to Tottenham Hotspur, while Brahim Diaz has joined AC Milan on loan.