Ferrari team principal Mattia Binotto admitted team strategy halted Charles Leclerc from triumphing at his home race, with Red Bull's Sergio Perez winning the Monaco Grand Prix.
Leclerc finished in fourth place after starting the race from pole position, which is critical at a circuit like Monte Carlo, with its tight streets making overtaking difficult and track position paramount.
Perez managed to keep Carlos Sainz in the other Ferrari at bay with an assured drive, but it was also borne of circumstance after a pit-stop mix-up before a second red flag tumbled Leclerc down the order.
Binotto conceded it was a team error that cost his drivers from claiming more points but specifically for Leclerc, a potential maiden Formula One win at a home race where he has been dealt constant bad luck.
"I fully understand the disappointment for Charles," the Ferrari boss told Sky Sports F1. "He was first and finishing fourth means that something was wrong in the decision we made.
"So clearly we need to review it and I think we underestimated the speed of the intermediate [tyres] at that stage, so we could have called a lap earlier for Charles or later on, maybe we should have left him outside on the extreme wet then going on the dry.
"These are mistakes that may happen, but more importantly it is a lesson to learn to try and understand why they happened and I am sure that is a process we will do."
Ferrari went down a further ten points in the constructor standings to Red Bull, who now lead by 36 points after both Perez and Max Verstappen finished on the podium.
Leclerc's fourth-placed finish also means Verstappen extended his lead atop the driver's standings to nine points, heading into the next grand prix in Azerbaijan.