The game is a re-run of the 2019 semi-finals, which saw Leinster claim a 30-12 victory at the same venue.

Mola recalled that defeat as he warned of Leinster’s quality, but admitted that much has changed since that meeting.

"We play a team that totally masters the European games,” he stated. “Three years ago, they took us out [in] the semi-finals.

“We learned a lot that day, and three years later we are no longer the same [team]. But neither [are] they.

"Leinster remains in my eyes a reference of European rugby, with this ability to provoke things, to have a structured, inspired and inspiring rugby.

“I remain convinced that they are the best team in Europe, for a very long time, in their rugby. In his way of thinking about rugby, with a philosophy and a whole organization around this philosophy."

To reach this season’s Heineken Champions Cup semi-finals, reigning champions Toulouse defeated Ulster Rugby 50-49 on aggregate in the Round of 16 before beating Munster Rugby 4-2 on place kicks after a 24-24 draw in the quarter-finals.

Mola highlighted that his team have the opportunity to take down a third Irish province on Saturday, something he believes would be a huge moment in Toulouse’s history.

"Are we able today to do Ulster, Munster, Leinster? I look into their championship,” he said. “No one has ever done that.

“We are always looking for something special and a little exceptional. If we are able to do it, we will certainly have marked an important page of the club."

Stade Toulousain head coach Ugo Mola has branded Leinster Rugby as Europe’s leading side as his team travels to Aviva Stadium in the Heineken Champions Cup semi-finals on Saturday.