Following the Heineken Cup Pool Draw, the fixtures for 2013/2014 have been released.
Dates and times for the Heineken Cup fixtures for Rounds 5 and 6 will be confirmed after Rounds 3 and 4 are complete.
| Date | Time | Pool | Home | Score | Away | Venue | Round 1 |
| 11/10/2013 | 20.00 | 3 | Connacht | 17-23 | Saracens | Sportsground |
| 11/10/2013 | 20.00 | 5 | Ulster | 22-16 | Leicester Tigers | Ravenhill |
| 11/10/2013 | 21.00 | 3 | Toulouse | 38-5 | Zebre | Stade Ernest Wallon |
| 12/10/2013 | 13.35 | 6 | Edinburgh | 29-23 | Munster | Murrayfield |
| 12/10/2013 | 14.35 | 5 | Treviso | 10-27 | Montpellier | Stadio Comunale di Monigo |
| 12/10/2013 | 15.40 | 4 | Harlequins | 26-33 | Scarlets | The Stoop |
| 12/10/2013 | 16.40 | 1 | Castres | 19-13 | Northampton | Stade Pierre Antoine |
| 12/10/2013 | 18.00 | 1 | Ospreys | 9-19 | Leinster | Liberty Stadium |
| 12/10/2013 | 18.00 | 6 | Gloucester | 27-22 | Perpignan | Kingsholm |
| 13/10/2013 | 12.45 | 2 | Exeter Chiefs | 44-29 | Cardiff | Sandy Park |
| 13/10/2013 | 16.00 | 2 | Toulon | 51-28 | Glasgow Warriors | Stade Félix Mayol |
| 13/10/2013 | 21.00 | 4 | Racing Métro | 13-9 | Clermont Auvergne | Stade Yves du Manoir | Round 2 |
| 18/10/2013 | 19.45 | 3 | Saracens | 16-17 | Toulouse | Wembley |
| 18/10/2013 | 20.00 | 5 | Leicester Tigers | 34-2 | Treviso | Welford Road |
| 19/10/2013 | 13.35 | 2 | Cardiff Blues | 19-15 | Toulon | Cardiff Arms Park |
| 19/10/2013 | 14.35 | 3 | Zebre | 6-33 | Connacht | Stadio XXV Aprile |
| 19/10/2013 | 15.40 | 1 | Leinster | 19-7 | Castres | RDS |
| 19/10/2013 | 16.40 | 5 | Montpellier | 8-25 | Ulster | Stade Yves du Manoir |
| 19/10/2013 | 18.00 | 4 | Scarlets | 26-26 | Racing Métro | Parc y Scarlets |
| 19/10/2013 | 18.00 | 6 | Munster | 26-10 | Gloucester | Thomond Park |
| 20/10/2013 | 12.45 | 1 | Northampton | 27-16 | Ospreys | Franklin’s Gardens |
| 20/10/2013 | 13.45 | 6 | Perpignan | 31-14 | Edinburgh | Stade Aimé Giral |
| 20/10/2013 | 14.00 | 2 | Glasgow Warriors | 20-16 | Exeter Chiefs | Scotstoun Stadium |
| 20/10/2013 | 16.00 | 4 | Clermont Auvergne | 23-16 | Harlequins | Stade Marcel Michelin | Round 3 |
| 06/12/2013 | 20.00 | 2 | Cardiff Blues | 29-20 | Glasgow | Cardiff Arms Park |
| 06/12/2013 | 21.00 | 1 | Castres | 15-9 | Ospreys | Stade Pierre Antoine |
| 07/12/2013 | 13.35 | 2 | Exeter Chiefs | 9-14 | Toulon | Sandy Park |
| 07/12/2013 | 14.35 | 3 | Zebre | 10-39 | Saracens | Stadio XXV Aprile |
| 07/12/2013 | 14.35 | 4 | Clermont Auvergne | 32-11 | Scarlets | Stade Marcel Michelin |
| 07/12/2013 | 16.40 | 4 | Racing Métro | 8-32 | Harlequins | Stade de la Beaujoire |
| 07/12/2013 | 18.00 | 1 | Northampton | 7-40 | Leinster | Franklin’s Gardens |
| 07/12/2013 | 18.00 | 5 | Ulster | 48-0 | Treviso | Ravenhill |
| 08/12/2013 | 12.45 | 6 | Munster | 36-8 | Perpignan | Thomond Park |
| 08/12/2013 | 13.00 | 6 | Edinburgh | 12-23 | Gloucester | Murrayfield |
| 08/12/2013 | 15.00 | 5 | Leicester Tigers | 41-32 | Montpellier | Welford Road |
| 08/12/2013 | 16.00 | 3 | Toulouse | 14-16 | Connacht | Stade Ernest Wallon | Round 4 |
| 13/12/2013 | 20.00 | 1 | Ospreys | 21-12 | Castres | Liberty Stadium |
| 13/12/2013 | 20.00 | 2 | Glasgow Warriors | 7-9 | Cardiff Blues | Scotstoun Stadium |
| 14/12/2013 | 14.35 | 2 | Toulon | 32-20 | Exeter Chiefs | Stade Félix Mayol |
| 14/12/2013 | 14.35 | 5 | Treviso | 3-35 | Ulster | Stadio Comunale di Monigo |
| 14/12/2013 | 15.00 | 3 | Saracens | 64-3 | Zebre | Allianz Park |
| 14/12/2013 | 15.40 | 4 | Scarlets | 13-31 | Clermont Auvergne | Parc y Scarlets |
| 14/12/2013 | 15.40 | 6 | Perpignan | 17-18 | Munster | Stade Aimé Giral |
| 14/12/2013 | 18.00 | 1 | Leinster | 9-18 | Northampton | Aviva Stadium |
| 14/12/2013 | 18.00 | 3 | Connacht | 9-37 | Toulouse | Sportsground |
| 15/12/2013 | 12.45 | 4 | Harlequins | 17-3 | Racing Métro | The Stoop |
| 15/12/2013 | 15.00 | 6 | Gloucester | 10-16 | Edinburgh | Kingsholm |
| 15/12/2013 | 16.00 | 5 | Montpellier | 14-15 | Leicester Tigers | Stade Yves du Manoir | Round 5 |
| 10/01/2014 | 20.00 | 5 | Ulster Rugby | 27-16 | Montpellier | Ravenhill |
| 10/01/2014 | 21.00 | 4 | Racing Métro | 13-19 | Scarlets | Stade Yves du Manoir |
| 11/01/2014 | 13.35 | 4 | Harlequins | 13-16 | Clermont Auvergne | Twickenham Stoop |
| 11/01/2014 | 14.35 | 5 | Treviso | 19-34 | Leicester Tigers | Stadio Comunale di Monigo |
| 11/01/2014 | 15.00 | 2 | Exeter Chiefs | 10-15 | Glasgow Warriors | Sandy Park |
| 11/01/2014 | 15.40 | 3 | Connacht | 20-3 | Zebre | Sportsground |
| 11/01/2014 | 15.40 | 2 | Toulon | 43-20 | Cardiff Blues | TBA |
| 11/01/2014 | 18.00 | 6 | Edinburgh | 27-16 | Perpignan | Murrayfield |
| 11/01/2014 | 18.00 | 6 | Gloucester | 7-20 | Munster | Kingsholm |
| 12/01/2014 | 12.45 | 1 | Ospreys | 17-29 | Northampton Saints | Liberty Stadium |
| 12/01/2014 | 13.45 | 1 | Castres Olympique | 22-29 | Leinster | Stade Pierre Antoine |
| 12/01/2014 | 16.00 | 3 | Toulouse | 21-11 | Saracens | Stade Ernest Wallon | Round 6 |
| 17/01/2014 | 20.00 | 1 | Leinster | 36-3 | Ospreys | RDS |
| 17/01/2014 | 20.00 | 1 | Northampton Saints | 13-3 | Castres Olympique | Franklin’s Gardens |
| 18/01/2014 | 13.35 | 3 | Saracens | 64-6 | Connacht | Allianz Park |
| 18/01/2014 | 14.35 | 3 | Zebre | 6-16 | Toulouse | Stadio XXV Aprile |
| 18/01/2014 | 15.40 | 2 | Glasgow Warriors | 8-15 | Toulon | Scotstoun |
| 18/01/2014 | 15.40 | 2 | Cardiff Blues | 13-19 | Exeter Chiefs | Cardiff Arms Park |
| 18/01/2014 | 18.00 | 5 | Leicester Tigers | 19-22 | Ulster | Welford Road |
| 18/01/2014 | 18.00 | 5 | Montpellier | 24-6 | Treviso | Stade Yves-du-Manoir |
| 19/01/2014 | 12.45 | 6 | Munster | 38-6 | Edinburgh | Thomond Park |
| 19/01/2014 | 13.45 | 6 | Perpignan | 18-36 | Gloucester | Stade Aimé Giral |
| 19/01/2014 | 15.00 | 4 | Scarlets | 20-22 | Harlequins | Parc y Scarlets |
| 19/01/2014 | 16.00 | 4 | Clermont Auvergne | 28-3 | Racing Métro | Stade Marcel-Michelin | Quarter-Finals |
| 05/04/2014 | 13.30 | Munster | – – | Toulouse | Thomond Park | |
| 05/04/2014 | 17.00 | Clermont Auvergne | – – | Leicester Tigers | Stade Marcel-Michelin | |
| 05/04/2014 | 18.30 | Ulster | – – | Saracens | Ravenhill | |
| 06/04/2014 | 17.30 | Toulon | – – | Leinster | Stade Felix Mayol |
All times are local.