"All three are very important signings for us. Michael has been outstanding for Cardiff and has been one of their key players over the past few seasons," Diamond told Sky Sports News. "Cardiff were very keen to retain him and he will be a really key addition to our pack next season. Though Michael has played at number eight predominantly this season for Cardiff, going forward I see him more as a lock for us.
"In terms of Kiril, I know him very well from working with him with the Russian national side. He has played very well for London Welsh this season and has a huge physical presence. He also has massive experience from his time with Castres. He played very well against us too earlier this season."
"As for Charlie, he is someone that we have had our eyes on for quite a while now. He was out for a year with a knee injury but has totally recovered from that and has been playing really well with Jersey. He's a really talented number six and is a really big, imposing lad and he will also add a lot to our pack."
Sale currently sit 11th in the Aviva Premiership table.