The visitors caught a bright start to the second half though as Robin Quaison's perfectly timed through ball allowed Jean-Philippe Mateta to halve the deficit against the run of the game in the 48th minute.
"Everyone will be desperate to beat Europe's top team," the 32-year-old Pole told Xinhua before the Bavarians' 2020/21 Bundesliga curtain-raiser against Schalke on Friday.
Cologne had the worst possible start on home soil as Jonas Hector's return pass was intercepted by Kramaric, who kept his cool and nutmegged goalkeeper Timo Horn for the opener with only three minutes gone.
The changes mean that the weekend will open with Villarreal at home to Eibar, with Villarreal looking to improve on an opening day's performance that saw them held 1-1 at home by newly promoted Huesca.
Puig, whose performances were one of the few positives in Barca's disappointing end to last season and who looked as if he was going to play a major role in the new season, was left in the stands for the club's traditional pre-season Joan Gamper friendly against Elche on Saturday night.
"We were highly motivated today, and we are ready to battle for the top spots in the Bundesliga," said Forsberg.
"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."
BEIJING, Sept. 17 (Xinhua) -- For the first time in history, the Chinese Basketball Association (CBA) league will introduce a salary cap for the coming 2020-2021 season.
Internacional lead Group E, three points ahead of second-placed Gremio, who lost 2-0 at Universidad Catolica in Chilean capital Santiago.
Mainz were unable to put up resistance but were lucky enough that Forsberg rattled only the woodwork in the 31st minute and Angelino hit the side netting from tight angle before the half time.
Events in indoor and outdoor arena will be separate.