Ferrari Team Principal Maurizio Arrivabene believes the outfit's qualifying pace is compromising its race ability, as Sebastian Vettel finished in fourth place in Monaco.
Vettel led the way during Saturday's final practice session but slipped back in Q3 and was able to clock only the fourth best time, as Red Bull's Daniel Ricciardo and the Mercedes pair moved clear.
In a wet/dry race Ferrari was unable to profit as it was overhauled by Force India's Sergio Perez to leave Vettel fourth, while Kimi Raikkonen crashed out.
"It was a very tricky race, and the outcome was partly compromised by our qualifying performance," he said.
"An aggressive race strategy, with an early call for Intermediate tyres, was the only option we could take to gain positions, and it's no use to complain about other drivers who hampered us on the track.
"If we had qualified better, the result would also had been better. Our car had a very good race pace but that's not enough, as we must make sure that we stay competitive for the whole weekend.
"We now look forward to the next race in Canada where we don't want to be caught out, as we want to be up to our name. The season is still very long, and it's not in the DNA of Ferrari to surrender.
"Having said this, we must work hard to cure our weak spots, while improving further on all areas where we are strong already."