Saracens and England scrum-half Richard Wigglesworth is happier to be playing with Billy Vunipola from now on rather than against him.
Wigglesworth toured South America with England in June and was impressed by the young number eight's ability and power.
Having made the summer move from London Wasps in order to link up with his brother Mako, Vunipola reported for pre-season training with Wigglesworth this week and the scrum-half believes he can go on to become a top player for the club.
"I played with him on tour and it reaffirmed that I'm very happy that I won't have to play against him ever again now, he is one big boy with some skills to go with it and in my opinion Billy is going to be a top class performer and he will be a great player for us," said Wigglesworth.
"The coaching staff and the strength and conditioners have been pretty intelligent as they have eased us in since we've returned, as some of us such as Billy (Vunipola), Stretts and Rhys (Gill) have only returned this week.
"I was wondering whether I'd be as excited this pre-season as maybe I was last year, as in the lead up to last pre-season was on the back of me being injured for some time, but I'm as excited this year and I can't wait to get going.
"We have an amazing squad here, which we've strengthened - we need to take that form which we had at the back end of last year of last season and start big.
"The standard of some of guys is superb; for instance Chris Ashton really is flying in training; I haven't seen him in better nick truth be told - he really is impressing.
"All the lads are in good condition really, and they are working really hard so it's up to us lads who arrived a bit later to catch them up now".
Wigglesworth competed with Northampton Saints scrum-half Lee Dickson in Argentina, with Ben Youngs away with the British and Irish Lions and Danny Care rested.
Highlighting the young average age of the England squad that sealed a first series win in Argentina since 1981, Wigglesworth was proud of the squad's achievements.
"The trip was good;, I was the elder statesman of that tour, along with Stretts (David Strettle), and at times it felt like we were in an under 20s camp," added Wigglesworth.
"There was a great set of lads on tour and we got some great results.
"It was good to have Guzzy (Paul Gustard) there; I think the lads really enjoyed his coaching style and he didn't hold back within in the group, I don't think many people knew what he was on about in his first meeting but his quality, knowledge and enthusiasm certainly impressed the squad that's for sure."