European Challenge Cup results after Saturday's early matches: Pool 1 Castres 42 Dragons 14 Worcester Warriors 66 Yenisey-STM Krasnoyarsk 10 Pool 2 Bayonne 27 London Irish 10 Pool 3 Bordeaux Begles 32 Edinburgh 17 Agen 24 Wasps 52 Pool 4 Stade Francais 24 Zebre 29 Bristol 52 Brive 3 Pool 5 Calvisano 19 Pau 47 Playing later on Saturday (all times GMT): Pool 2 Scarlets v Toulon (2000) Playing on Sunday: Pool 5 Leicester Tigers v Cardiff Blues (1515) afp