For Munster, Stander starts at the base of the pack, but there is less good news on star Ireland scrum-half Conor Murray who isn't fit to be involved. Duncan Williams starts in his place, but there is no reserve No 9 on the bench in what is something of a gamble by director of rugby Rassie Erasmus.
Stander has overcome the ankle injury sustained against Toulouse in his team's quarter-final win and is one of five changes to Erasmus' side. He joins Peter O'Mahony and Tommy O'Donnell in the back-row.
Williams and Tyler Bleyendaal, who have both had injury problems of their own, start at half back. Jaco Taute and Rory Scannell combine in midfield with Andrew Conway, Keith Earls and Simon Zebo in the back three.
The game at the Aviva Stadium is set to take place in front of a packed Dublin crowd and promises to be an enthralling clash. Both teams have proud European records, but only one can make next month's final in Edinburgh at BT Murrayfield and a meeting with either ASM Clermont Auvergne or Leinster Rugby.
Saracens include their six Lions in the two Vunipola's, George, Kruis, Itoje and Farrell in the side selected by McCall. Michael Rhodes and Jackson Wray join Billy Vunipola in the back-row. Marcelo Bosch, the Argentine midfielder, makes his 50th appearance in the Champions Cup with Sean Maitland, Chris Ashton and Alex Goode in the back three.
Munster: Simon Zebo; Andrew Conway, Jaco Taute, Rory Scannell, Keith Earls; Tyler Bleyendaal, Duncan Williams; Dave Kilcoyne, Niall Scannell, John Ryan; Donnacha Ryan, Billy Holland; Peter O'Mahony (capt), Tommy O'Donnell, CJ Stander
Reps: Rhys Marshall, James Cronin, Stephen Archer, Dave O'Callaghan, Jean Deysel, Ian Keatley, Francis Saili, Darren Sweetnam
Saracens: Alex Goode; Chris Ashton, Marcelo Bosch, Brad Barritt (capt), Sean Maitland; Owen Farrell, Richard Wigglesworth; Mako Vunipola, Jamie George, Vincent Koch, Maro Itoje, George Kruis, Michael Rhodes, Jackson Wray, Billy Vunipola
Reps: Schalk Brits, Titi Lamositele, Petrus Du Plessis, Jim Hamilton, Schalk Burger, Ben Spencer, Alex Lozowski, Chris Wyles
Referee: Romain Poite (France)
Munster Rugby v Saracens Match Facts
- This will be Munster's 12th European Cup semi-final - a record for the competition - while Saracens have reached the semi-finals for a sixth time and for the fifth season in a row.
- Munster will be playing their 158th tournament game - the most of any club. The two-time champions are currently level with Toulouse, who they beat in the quarter-finals, on 157 matches.
- This will be the 8th meeting between the clubs; Munster have won five of the previous seven clashes (L2), although those two defeats against Saracens have come in their last three meetings.
- These sides have met once before in the semi-final with Munster progressing to the final in 2008 after an 18-16 victory at the Ricoh Arena before going on to lift trophy in Cardiff.
- Saracens are unbeaten in their last 16 Champions Cup games (W15, D1), and only Leinster have gone on a longer unbeaten streak in the competition (W16, D1, 2010-2012).
- Munster have won their last four Champions Cup games and have not gone on a longer run since winning six-in-a-row in 2013/14 when they last reached the semi-final.
- Chris Ashton needs just one try to become the outright top try scorer in European Cup history. He is currently level with Vincent Clerc on 36 tries.
- Munster (5) and Saracens (8) have conceded fewer tries than any other side this season, with both teams yet to concede a first-half try.
- CJ Stander has made 114 carries this season, and no other player has made 100+ carries so far in the competition.
- Owen Farrell (97) and Tyler Bleyendaal (94) are the top point scorers in the Champions Cup this season, and no other player has scored more than 80 points to date. Farrell was last season's top scorer with 127 points.