New Wimbledon champion Andy Murray has paid tribute to Ivan Lendl, who took over as the world No 2's coach at the start of 2012.
Since the pair began working together, the 26-year-old from Dunblane has won two Grand Slam titles as well as an Olympic gold medal.
On Sunday, at SW19, Murray became the first Briton since Fred Perry in 1936 to win the men's singles title, beating Novak Djokovic in straight sets.
Lendl, himself an eight-time Grand Slam winner and former world No 1 - but never a Wimbledon champion - has put Murray through his paces for the past 18 months.
And Murray said: "Ivan's been great, he's worked very hard with me and been very patient because I'm not easy at times.
"There's been some tough love. Been hard on me and made me learn more from my defeats than I had previously done before.
"He's been extremely honest and improved my mentality during the past year.
"He stuck by me and I'm just happy I managed to do it for him. He would have loved to have won here but I think this was the next best thing for him."
Murray admitted Lendl's honest approach had been crucial, particularly after his loss to Roger Federer in the final at Wimbledon last year.
"I think he's always been very honest with me. He's always told me exactly what he thought. And in tennis, it's not always that easy to do in a player/coach relationship.
"Last year after the final he told me he was proud of the way I played because I went for it when I had chances. It was the first time I played a match in a grand slam final like that.
"He's got my mentality slightly different going into those sort of matches."