Cardiff Blues will play their 100th Heineken Cup match when they travel to the Madejski Stadium in Round 5 to meet London Irish.
They will join Toulouse, Munster, Leinster, Leicester Tigers and the Scarlets as tournament centurions, while Perpignan will play their 100th European match when they host Newport Gwent Dragons at Stade Aime Giral in Round 5 of the Amlin Challenge Cup.
Perpignan will have played 75 Heineken Cup and 25 Amlin Challenge Cup matches and will be the 14th club to reach the 100 ERC match mark with Gloucester Rugby becoming club No 15 in Round 6 when they clash with four times Heineken Cup winners Toulouse at Kingsholm.
122 – Toulouse (122 HC)
121 – Munster Rugby (119 HC + 2 ACC)
110 – Leinster Rugby (110 HC)
109 – ASM Clermont Auvergne (55 HC + 54 ACC)
108 – Leicester Tigers (108 HC)
106 – Castres Olympique (50 HC + 56 ACC)
106 – Stade Francais Paris (79 HC + 27 ACC)
105 – Bath Rugby (70 HC + 35 ACC)
103 – Scarlets (103 HC)
103 – Biarritz Olympique (84 HC + 19 ACC)
102 – Cardiff Blues (99 HC + 3 ACC)
102 – Connacht Rugby (98 ACC + 4 HC)
100 – London Wasps (78 HC + 22 ACC)
99 – Perpignan (75 HC + 24 ACC)
98 – Gloucester Rugby – (56 HC + 42 ACC)
97 – Northampton Saints (69 HC + 28 ACC)
97 – Brive (23 HC + 77 ACC)
96 – Sale Sharks (37 HC + 59 ACC)
HC = Heineken Cup ACC = Amlin Challenge Cup