Simone Inzaghi conceded Inter "didn't show the level we're capable of" during their defeat to Bayer Leverkusen on Tuesday.

The Nerazzurri suffered their first loss of the Champions League season as they went down 1-0 at BayArena after Nordi Mukiele's late winner.

It marked the first goal Inzaghi's side had conceded in their opening six games, while they failed to register a single shot on target at the other end of the field.

And the Inter head coach acknowledged he wanted to see more from his players.

"It wasn't one of our best matches, but we faced a top-quality team that started better, hitting the crossbar early on," he said. "After that, we controlled the game - perhaps too much, as we should have been more daring.

"We lacked quality in the final 25 metres, and once we had the match under control, losing like this is frustrating because it ends our unbeaten streak.

"There's regret about conceding that goal. We needed to be more attentive. We played worse in the second half than the first, but there were no warning signs.

"When we started building possession, it felt like they were struggling to cope with our play. We should've added more quality, but today, we didn't show the level we’re capable of. We certainly needed to do more."

Nevertheless, Inzaghi also focused on the positives with Inter occupying fourth place in the league table - with the top eight seeded straight through to the knockout stage.

"Still, it doesn't take away from our journey," he added. "[On Wednesday], we'll probably be among the top eight, and in January, our destiny will be in our hands with two challenging matches.

"There's regret, but that's Champions League football. We move forward with our heads held high."