Flick's tactical approach, featuring an extremely high defensive line, also seemed ripe for Mbappe and Vinicius to pillage with their pace.
Swedish prosecutors on Tuesday confirmed an investigation had been launched -- without naming Mbappe -- following an alleged rape at a plush Stockholm hotel on October 10.
Los Blancos take on their rivals without the French forward, ruled out for three weeks with a hamstring injury.
The format may be new, but few would bet against the winner staying the same.
The 2018 World Cup winner almost joined Caen as a teenager before eventually signing for Monaco.
The France captain, to his credit, was sublime in creating the goal that beat Austria 1-0, but his failure to score at a Euros will weigh heavily on a player who has found the net 12 times at World Cups, including a hat-trick in the 2022 final.
"The Euros is very important in our careers, but we are citizens first and foremost and I don't think we can be disconnected from the world around us," said Mbappe.
Mbappe, 25, verbally agreed to move to Real in February and then announced in May he would leave PSG at the end of the season.
PSG's decision to withhold Mbappe's salary is related to an agreement between the two parties made last year, at the start of the season, when the player accepted to waive part of a bonus due to him, the source said.
Tottenham goalkeeper Lloris brought an end to his international career in January after losing the World Cup final a month earlier
Paris St Germain suffered yet another setback as they slumped to their first Ligue 1 home defeat of the season when they were beaten 2-0 by Stade Rennais on Sunday.
PSG have been left with just the Ligue 1 title to play for in the remaining months of the season after the Qatar-owned club were knocked out of Europe's elite club competition in the last 16 with a 3-0 aggregate defeat
Paris Saint-German forward Neymar arrived in Doha on Friday for an operation on the ankle injury that has ended his season, Qatar's official news agency said.
PSG, trailing 1-0 from the first leg in Paris, were beaten 2-0 in the return game at the Allianz Arena to drop out of the competition in the last 16 for the fifth time in seven seasons
Eric Maxim Choupo-Moting scored against his former club as Bayern Munich ended the Champions League hopes of Paris Saint-Germain on Wednesday, beating the French club 2-0 in their last-16 second leg to reach the quarter-finals.
Bayern Munich host Paris Saint-Germain on Wednesday with the stage set for star turns from their 2022-23 additions Sadio Mane and Matthijs de Ligt.
"It stays in the back of my mind, which is normal. If I keep going like this, I don't think I'll be very far off it,"
The ceremony takes place in Paris, and Messi appears as the favourite to add another individual gong to his collection after leading Argentina to glory over Mbappe's France in that epic encounter in Qatar.
On Saturday, coach Christophe Galtier said he did not think Mbappe would play on Tuesday
