By Paul Sculthorpe St Helens star and BBC Sport Online columnist

Paul Sculthorpe says St Helens' never-say-die spirit could give them the edge in Sunday's Challenge Cup semi-final against Leeds Rhinos.

Leeds will be keen to put one over on us on Sunday after last year's semi-final defeat but they already know they cannot afford to relax until the final hooter goes.

We were staring defeat in the face in last week's Super League game at Knowsley Road until Anthony Stewart came up with a last-gasp try.

But that's St Helens for you. We never know when we are beaten.

It's going to be a whole new ball game on Sunday at the JJB Stadium.

Expect a much more intense game played at a frenetic pace.

It's a semi-final after all and there are no second chances.

But we've been there before and know what it takes to win big games like this.

We are prepared to go that extra distance and won't buckle under the pressure.

We've also got a decent record at the JJB Stadium, which is a good omen for us.

Last year's semi-final win over the Rhinos came at that venue while we have turned over Wigan on their own patch a few times as well.

But we won't be taking anything for granted.