By Ray French BBC Sport rugby league commentator

How fitting that having played in a St Helens v Wigan Challenge Cup final in 1966, I am about to commentate on my 21st successive final with the prospect of another clash between the great rivals.

What's more, it is only the fifth final between the sides in over 106 years of League's most famous knockout tournament.

And how fitting that during my years behind the microphone, my two most memorable matches should feature the same two sides.

Who will ever forget the 50th Challenge Cup final at Wembley between Wigan and Hull?

It was a 10-try extravaganza which included one of the two most amazing fightbacks ever seen at the famous old stadium.

With Wigan leading 22-8 after just 43 minutes, and with their opponents reeling from a spectacular try by Aussie fly-half Brett Kenny, the fans from the Boulevard looked set for a miserable final half-hour.

Robbie Paul won with Bradford in 2000

But it was not to be, thanks to the inspiration of Kenny's Aussie Test half-back partner Peter Sterling and Kiwi try-scorer James Leuluai, who led Hull to a thrilling recovery.

At 28-24 in Wigan's favour, Hull had the leaders desperate for the final whistle in a dramatic closing four minutes of play.

Wigan managed to hang on that year but in 1996 the Bradford Bulls sensationally collapsed in the face of the best recovery ever seen at Wembley.

St Helens roared back from 26-12 down with only 23 minutes remaining.

Lance Todd Trophy winner Robbie Paul's first ever Wembley hat-trick mattered little as Saints' little midfield general Bobbie Goulding tormented the Bull's full-back Nathan Graham.

Goulding launched three towering kicks into the air and produced match-clinching tries for Cunningham, Booth and Pickavance.

It was an incredible finish to an amazing match.

Sometimes the scoreline escapes me but I can always remember spectacular tries, last-gasp goals or a dramatic match-saving tackle.

The two tries scored by Widnes' Joe Lydon in the 19-6 win over Wigan in 1984 brought the fans and myself to our feet as he sliced through gaps in a hesitant defence.

Lydon scored twice in 1984

And tiny 5'2'' wing Jamie Sandy's touchdown for Castleford in the 63rd minute of their 15-14 win against Hull KR will long live in my memory.

Nor will I ever forget perhaps the greatest try scored at Wembley when Wigan's Martin Offiah raced 90 metres before touching down for the first of his two tries.

In 1983, Featherstone Rovers' Steve Quinn's match-winning goal, with only three minutes remaining, brought tears to the eyes of the fans as they beat Hull 14-12.

But it was shock which registered on the faces of St Helens fans in 1987 against Halifax.

The Blue Sox' John Pendlebury punched the ball from Saints' Mark Elia just as he was about to touch down for a try which would have proved to be St Helens' match-winner.

Wonderful moments and all part of the rich tapestry of the RFL's Challenge Cup final.

And there will be plenty of talent on view at Murrayfield to add another magical moment or two for the St Helens and Wigan supporters.

And myself!