Koeman has worked with the majority of the Barca squad for three weeks and said he was content with the work done so far.
After a goalless 90 minutes, the visitors were close to victory in extra-time when their Slovenian striker Zan Medved scored with a beautiful header after a long center-pass with only nine minutes left.
Keno doubled his personal tally with a low finish and then headed in his third goal by latching on to a Mariano cross.
The 37-year-old was among 26 players summoned by head coach Gerardo Martino for the Tricolor's first fixtures of the year, which will be preceded by a five day training camp starting Saturday.
The decision to declare Gor Mahia the 2019-20 champions in March with nine games of the season left due to the outbreak of the pandemic was upheld by a local tribunal on Tuesday.
"I've kept in contact with [head coach Lionel] Scaloni, Walter Samuel and Roberto Ayala," he told TyC Sports. "Since my injury they never stopped writing to see how I was so I am very grateful for that.
Monchengladbach approached Dortmund's goal dangerously for the first time in the 32nd minute when custodian Roman Burki saved Jonas Hofmann's shot from very close range.
NAIROBI, Sept. 17 (Xinhua) -- After making remarkable progress to join elite high jumpers in the world, Kenyan Mathew Sawe has put the Nairobi Continental Tour slated for October 3 in his crosshairs and called on top athletes to grace the event, dubbed the Kip Keino Classic.
Despite their dominance, Hertha needed 19 minutes to create the first clear-cut opportunity as Krzysztof Piatek's header rattled the crossbar.
Clubs from 13 (of 16) federal German states will play home games under the new conditions this weekend as the top three football tiers start their new season.
"I don't think David is demanding to stand above those two," the 43-year-old said.