This is the part where you can get involved. We want to hear what you think about The United States's chances. Can they pull off the improbable? Who will be the key players out there?

Also tell us about some of your most memorable comebacks in sport.

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Medinah isn't the only example of four-point leads being overturned.

The US overturned the same advantage in Brookline in 1999, having so nearly done it from 10½-5½ down at Valderrama two years before.

You can bet your bottom dollar, skipper Tom Watson will have been quoting from the history books last night in order to install belief into his men.

It may be advantage Europe but anything can happen in the Ryder Cup - that is why we love it.

Rob Hodgetts
BBC Sport at Gleneagles

"Gleneagles already rocking. Ten deep behind the practice range, thunderous songs and cheers coming from the first tee. And that's with an hour to go before kick-off. The air is warm, the clouds are benign and there's a festival atmosphere. Sounds like this crowd are in the mood to roar Europe to the earliest possible win."

This time though, the boot is on the other foot.

It is America trailing Europe by four points going into the final day's singles at Gleneagles. It is America looking down and out and it is America needing their own version of 'the miracle at Medinah'.

Four points are standing between Europe and an eighth Samuel Ryder trophy in the last 10 meetings. Easy.......... or maybe not.

We will have live text commentary of all the action. So stick with us.

Image source, AFP

On 30 September 2012, 12 European golfers had been written off. They were told their dreams were over, pride was all there was to play for.

The next day at Medinah, Jose Maria Olazabal's men proved everyone wrong. A four-point deficit was turned into a famous Ryder Cup victory.

Lightning doesn't strike twice though. Does it?