Inter boss Cristian Chivu is perfectly happy with his options as he insisted his team do not need new signings to improve.
The Serie A leaders progressed to the semi-finals of the Coppa Italia by beating Torino 2-1 on Wednesday.
Wednesday's quarter-final was played on neutral turf in Monza, due to San Siro being used for the opening ceremony at the Winter Olympic Games, but Inter showed no signs of homesickness.
Ange-Yoan Bonny and Andy Diouf, who are both 22, were on target to seal Inter's spot in the last four.
Despite Denzel Dumfries being out injured, Inter did not bolster their squad in January, making only one signing, with Yanis Massolin joining but then immediately loaned back to Modena.
But Chivu, whose team are five points clear at the top of Serie A, does not believe Inter need new signings to make them a better team.
"You can improve a squad even without bringing in new players," he told Sport Mediaset, as quoted by Football Italia.
"We tried to do something, but the January transfer market is very tricky. We had 23-24 players, but these great lads from the Under-23 side can give us a hand.
"We know who we are dealing with and the players we worked with. These are games where you need energy and fresh legs, so I chose the players who had energy.
"Don't forget we had a busy January and will have an even busier February.
"Stefano Vecchi is doing a great job as coach of the Under-23 side, and these lads are improving, so they can be of use to us throughout the season.
"We want to be competitive, to give a sense of consistency to what has been done in recent years. We keep going with belief, hard work, good performances, always aware that we can continue to improve."
Inter now face another busy month in which they will also take on Bodo/Glimt in a two-legged play-off to reach the Champions League knockout stages.
"I am never worried, I like playing football, and as a player I preferred it to training," said Chivu.
"Inter must never lack ambition, but that also must not be mistaken for obsession, because high expectations can create disappointment. We work hard to ensure we are ready, that is what these lads have always done."