| Home team | Leinster |
| Away team | Toulon |
| Venue | Aviva Stadium |
| Competition | Champions Cup |
| Kick off time | 3 pm (UK) |
| Watch Live in the UK | Premier Sports |
Leinster vs Toulon Champions Cup semi-final preview as the sides meet at the Aviva Stadium.
Leinster progressed to the semi-final after a comfortable win over Sale Sharks in the quarter-final, while Toulon pulled off two narrow wins in the knockout stages.
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Leinster vs Toulon lineups
| Leinster | Toulon | ||||
| Forwards | |||||
| Porter | 1 | Gros | |||
| Sheehan | 2 | Baubigny | |||
| Clarkson | 3 | Sinckler | |||
| McCarthy | 4 | Mezou | |||
| Ryan | 5 | Ribband | |||
| Conan | 6 | Kpoku | |||
| Van Der Flier | 7 | Ollivon | |||
| Doris | 8 | Shioshvili | |||
| Backs | |||||
| Gibson-Park | 9 | White | |||
| Byrne | 10 | Albornoz | |||
| Ioane | 11 | Tuicuvu | |||
| Henshaw | 12 | Sinzelle | |||
| Ringrose | 13 | Brex | |||
| T O’Brien | 14 | Drean | |||
| Keenan | 15 | Jaminet | |||
| Replacements | |||||
| Kelleher | 16 | Lucchesi | |||
| Cahir | 17 | Brennan | |||
| Slimani | 18 | Gigashvili | |||
| Soroka | 19 | Halagahu | |||
| Penny | 20 | Mercer | |||
| McGrath | 21 | Serin | |||
| Prendergast | 22 | Abadie | |||
| Osborne | 23 | Ferte | |||
Recent Form:
Leinster (Home team):
| Result | Date | Competition | Opponent | Score |
| Loss | 25th April 2026 | URC | Benetton | 29-26 |
| Won | 18th April 2026 | URC | Ulster | 21-29 |
| Won | 11th April 2026 | Champions Cup | Sale Sharks | 43-19 |
| Won | 5th April 2026 | Champions Cup | Edinburgh | 49-31 |
| Won | 27th March 2026 | URC | Scarlets | 36-19 |
Leinster have won four of their last five matches, which include the two wins in the Champions Cup knockout stages. In their last game in the URC, Leinster conceded a last-minute penalty to Benetton to lose. They lost 29-26, having had a 19-5 lead just after halftime. They conceded three second-half tries, which left it 26-26 when the clock went into the red.
Toulon (Away team):
| Result | Date | Competition | Opponent | Score |
| Won | 25th April 2026 | Top 14 | Bayonne | 52-26 |
| Won | 18th April 2026 | Top 14 | Montauban | 22-47 |
| Won | 11th April 2026 | Champions Cup | Glasgow Warriors | 19-22 |
| Won | 4th April 2026 | Champions Cup | Stormers | 28-27 |
| Loss | 28th March 2026 | Top 14 | Perpignan | 36-20 |
Toulon have been in great form since their Champions Cup round of 16 win over the Stormers. They have won four in a row, with their last two league matches being by a substantial margin. Their two knockout wins in the Champions Cup have been by three points or less. In the last round against Bayonne, they scored eight tries as they won 52-26. They scored five in the first half to take a dominant 33-12 lead at half-time.
Leinster vs Toulon head-to-head record (last four matches):
| Date | Competition | Winner | Score |
| 19th December 2015 | Champions Cup | Toulon | 16-20 |
| 13th December 2015 | Champions Cup | Toulon | 24-9 |
| 19th April 2015 | Champions Cup | Toulon | 25-20 (AET) |
| 6th April 2014 | Champions Cup | Toulon | 29-14 |
Toulon have won all four meetings between these sides, all of which came in an 18-month period when Toulon were in their pomp in 2014 and 2015. They met in the 2014 Champions Cup quarter-final and the famous 2015 Champions Cup semi-final, which saw Bryan Habana score an intercept try to win 25-20 in extra-time.
