Check out PA Sport's Heineken Cup semi-final guide ahead of this week's action.

LONDON IRISH v TOULOUSE (Twickenham, Saturday, 1500)

London Irish (Pool One winners)

Rugby director: Brian Smith.

Captain: Bob Casey.

Cup best: Semi-finals 2008.

This season: Treviso (h) won 42-9, Newport Gwent Dragons (a) won 45-17, Perpignan (h) won 24-16, Perpignan (a) lost 23-6, Newport Gwent Dragons (h) won
41-24, Treviso (a) won 24-11.

Quarter-final: Perpignan (h) won 20-9.

Points scored: 202.

Points conceded: 109.

Top points: 90 - Peter Hewat.

Top tries: 4 - Tomas De Vedia, Peter Hewat.

Player to watch: Peter Hewat.

Toulouse (Pool Six winners)

Coach: Guy Noves.

Captain: Fabien Pelous.

Cup best: Winners 1996, 2003, 2005.

This season: Edinburgh (a) won 19-15, Leinster (h) won 33-6, Leicester (a) lost 14-9, Leicester (h) won 22-11, Leinster (a) lost 20-13, Edinburgh (h) won
34-10.

Quarter-final: Cardiff Blues (h) won 41-17.

Points scored: 171.

Points conceded: 93.

Top points: 51 - Jean-Baptiste Elissalde.

Top tries: 5 - Vincent Clerc.

Player to watch: Cedric Heymans.

Head to head: London Irish 1 Toulouse 3.

SARACENS v MUNSTER (Ricoh Arena, Coventry, Sunday, 1500)

Saracens (Pool Four winners)

Rugby director: Alan Gaffney.

Captain: Neil de Kock.

Cup best: Semi-finals 2008.

This season: Glasgow (h) won 33-31, Biarritz (a) lost 22-21, Viadana (h) won 71-7, Viadana (h) won 34-26, Biarritz (h) won 45-16, Glasgow (a) won 21-17.

Quarter-final: Ospreys (h) won 19-10.

Points scored: 244.

Points conceded: 129.

Top points: 112 - Glen Jackson.

Top tries: 5 - Richard Haughton.

Player to watch: Cobus Visagie.

Munster (Pool Five winners)

Rugby director: Declan Kidney.

Captain: Paul O'Connell.

Cup best: Winners 2006.

This season: Wasps (a) lost 24-23, Clermont Auvergne (h) won 36-13, Llanelli Scarlets (a) won 29-16, Llanelli Scarlets (h) won 22-13, Clermont Auvergne (a)
lost 26-19, Wasps (h) won 19-3.

Quarter-final: Gloucester (a) won 16-3.

Points scored: 164.

Points conceded: 98.

Top points: 89 - Ronan O'Gara.

Top tries: 2 - Rua Tipoki, Brian Carney, Shaun Payne, Marcus Horan.

Player to watch: Doug Howlett.

Head to head: Saracens 0 Munster 2.