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Japan's Kotaro Matsushima scored three times as Clermont opened their European Champions Cup campaign with an impressive 51-38 bonus-point win at Bristol on Saturday.
Matsushima's tries came within the opening 68 minutes as the three-time runners-up dominated the second-tier European Challenge Cup holders with some scintillating expansive play.
Clermont head coack Franck Azema praised Matushima's performance along with wingers Damian Penaud and Alivereti Raka.
"I'm very happy with the work of the lads work today," Azema said.
"They have worked a lot together, even if they haven't got a lot cohesion," he added.
Fiji's Semi Radradra missed Bristol's first match in Europe's top-tier club competition since 2008 with a leg injury suffered in last weekend's Autumn Nations Cup victory over Georgia.