Inter Milan captain Lautaro Martinez admitted on Tuesday that he was still baffled by his side's capitulation in the 5-0 loss to Paris Saint-Germain in the Champions League final on 31 May.
In an interview with the Italian newspaper La Gazzetta dello Sport, published just ahead of Inter's first competitive game since the slaughter at the Allianz Arena in Munich, Lautaro said: "I was sad and it was hard to understand why it had happened.
"I didn't speak for five or six days," he added. "That night of the final, nothing was possible and we lost everything. It wasn't us. We weren't a team.
"And now we have to move on, there's no other solution, even if it's all still in my head."
Inter take on Monterrey on Tuesday night at the Rose Bowl in Pasadena in their first game in Group E at the Club World Cup in the United States.
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The Italian outfit feature in the 32-team competition on the basis of their performances in the Champions League between 2021 and 2024.
The defeat to PSG – the heaviest in a final in the 70-year history of European club football's most prestigious tournament – ended a grim series for Inter.
In April, they were eliminated in the semi-final of the Coppa Italia and the Friday before the Champions League final, Napoli pipped them by a point to the Serie A title.
"I've spoken to the lads and I've asked them to be mentally strong," said Martinez who has urged his troops to seek redemption at Fifa's showpiece event.
"I've explained to them that one last effort is needed before we go on holiday," Martinez added. "There is one last little stretch of the road to continue to progress.
"We're Inter Milan. We're a mature team. We always want to reach the top. We want to play this Club World Cup to the full."
Dominant start for PSG
In their first game since brandishing the Champions League trophy, PSG pulverized Atletico Madrid 4-0 at the Club World Cup to launch their bid for a fifth title of the season.
PSG claimed the French Super Cup in January and followed the success up with the Ligue 1 title, the Coupe de France and then the Champions League.
The stroll past Atletico at the Rose Bowl in Pasadena was attended by 80,000 fans.
On Monday, just 22,137 turned up at the 70,000-capacity Mercedes-Benz stadium in Atlanta to watch Chelsea beat Los Angeles FC 2-0.
Pedro Neto opened the scoring for the English Premier League outfit in the 34th minute and Enzo Fernandez doubled the advantage in the 79th minute.
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"I think the environment was a bit strange, the stadium was almost empty, not full,” said Chelsea boss Enzo Maresca said after the game.
In other ties at the tournament, in Group C, Boca Juniors squandered a 2-0 lead to draw 2-2 with Benfica and in Group D, Flamengo beat Esperance 2-0.
The Brazilians took the lead in the 17th minute at Lincoln Financial Field in Philadelphia when Luiz Araujo set up Giorgian de Arrascaeta.
With 20 minutes remaining, the provider turned predator.
There were also vast sections of empty seats at Lincoln Financial Field where 25,797 fans gathered in a stadium that can hold nearly 70,000.
On Tuesday night in Group E, River Plate face Urawa Red Diamonds and in Group F, Fluminense take on Borussia Dortmund.
