Guardiola hails 'incredibly dangerous' Foden and 'extraordinary' Mendy after City's Zagreb win
Gabriel Jesus scored a hat-trick as City, who were already sure to progress from Group C, came from a goal down to win 4-1 in Croatia and complete an unbeaten group-stage campaign, but Foden was the standout performer on his 50th appearance for the club.
When it was put to Guardiola in a news conference that Foden's display was "something else" for a 19-year-old, the City manager smiled and replied: "As always."
Guardiola added: "I think when he's close to the box he's more dangerous than when he's away from the box. I think he still has to learn a little bit when he plays a little bit away [from the box]... the tempo, the spaces".
"But when he plays close to the box and he can attack the central defenders, attack the goal, he's an incredibly dangerous player. So he played really well again. Really, really well."
Mendy has struggled for fitness and form during his time at City, but Guardiola was also impressed with the former Monaco defender's display, stating: "He played his best game of the season."
However, the former Barcelona coach refused to reveal whether Mendy can consider himself the Premier League champions' first-choice left-back, with Angelino and Oleksandr Zinchenko his other options.
"They have to fight... and I will decide," said Guardiola. "Angelino, when he played, especially at Anfield in a tough game, he was incredible. We know the quality from Oleks [Zinchenko], and of course Mendy has this physicality when he's fit and especially when his mind and his head is in the right position, he's an extraordinary player."
Dinamo finished bottom of the group as a result of their defeat, when a win would have earned them second place at Atalanta's expense.
Nevertheless, coach Nenad Bjelica said: "I am proud and happy for everything we showed in these six matches. We were fighting to go through until the last half of the group stage and we played against big clubs all the way."