Gretar Steinsson has described Bolton team-mate Jussi Jaaskelainen as 'a lunatic' for training even more than him.
Jaaskelainen is in his 14th season with the Trotters and the 35-year-old Finn will play in his second FA Cup semi-final on Sunday after being in the side that lost to Aston Villa in 2000.
Steinsson joined the veteran keeper at the Reebok Stadium in January 2008 and is also set to start at Wembley as Owen Coyle's men aim to get past Stoke and reach their first FA Cup final since 1958.
The Icelandic full-back was immediately taken aback by Jaaskelainen's professionalism and believes he could continue to excel in goal for Bolton for years to come.
"Jussi is a fantastic goalkeeper and I really enjoy working with him," he said.
"He is probably the best professional I have ever worked with. We have really good professionals at the club, who work really hard off the pitch. He is definitely the top one.
"When I came on trial some years ago I told stories about him when I returned home because I had met a lunatic who trained more than me and still does. I really respect him and there is no sign of him stopping."
Although signed by Gary Megson, Steinsson is loving life under his successor Coyle, who took charge in January 2010.
The Trotters have been much more adventurous under the former Burnley boss and Steinsson insists they will continue to take the game to the opposition despite the magnitude of Sunday's game.
"We've got goals in us," he said. "We tend to go for it. The players like the ideas of the manager.
"It is high energy and really exciting as you never know what is going to happen.
"We know it is a big occasion but for foreign players who have been playing around Europe, like myself, we will prepare like we do for any other away game.
"People talk about Stoke in terms of throw-ins, free-kicks and corners but they have some good footballers," Steinsson added.
"Both teams have done brilliantly and it will be a really even, exciting game as there are a lot of experienced players around."