Roberto Mancini has accepted the fate that Inter are a few years behind their rivals.
Just two wins in a series of games has seen Inter drop from top spot to sixth on the log.
And Mancini is now faced with a tough task of fighting for the third and final UCL slot.
“We’re not giving up, nothing is over and there’s still a long way to go,” he told the Inter Channel.
“It takes time to build a winning team, and I think Inter are a few years behind. We know it’ll take a bit of time and we’ll have to go through difficult spells.
“We did well up until December, but difficult times will come during the season. That’s where you have to be strong, stand up and not give up, even though disappointments can sometimes be bitter.
“Now we have to continue to work, we need more concentration and calmness.”