So back in the day when I started to seriously follow the UFC in 2007 (was watching only pride before) I became very impressed with GSP and his dispatching of Koschek, Hugues and Serra. Long story short to me his coach was always Greg Jackson. I remember Greg telling him at UFC 100 when GSP mentioned a groin injury "I don't care, hit him with your groin!". Greg was also his coach in TUF against Koschek. Greg also said that he wouldn't train anybody for the condit fight because they were from the same team. For me he was his only coach. Call me a noob but I didn't know about Firas Zahabi until his fight with Hendricks in 2013. And just before that fight I saw a Diego Sanchez tweet cheering for Hendricks followed by a justification saying that GSP wasn't his training partner at Jackson's and that he'd come only once a year or every two years. Since then GSP was only referred as Tristar product, not a Jackson fighter anymore. So what's the deal ? Was he always with Tristar and Firas and only getting private sessions with Greg ? Was he with Greg the whole time but something happened ? I honestly do not understand this matter. If anyone can explain thank you buds.