Celtic centre-back Kelvin Wilson has heaped praise on Manchester United trio Paul Scholes, Ryan Giggs and Gary Neville.
The Hoops defender will clinch his second consecutive title with the Bhoys, in his first Champions League campaign, this season but indicated that it is a lot of hard work to remain at the top for two years, let alone an entire career like the aforementioned United legends.
"I look at the likes of Paul Scholes, Ryan Giggs and Gary Neville and think that they have competed in Europe and won titles for so many years," said Wilson.
"We've done it this year for the first time and it's tough - I really take my hat off to them because they did it for 17 or 18 years running!
"I think you only appreciate what the likes of Giggs has done when you have had a go at it yourself."