England manager Roy Hodgson admits he is worried ahead of Tuesday night's crunch World Cup qualifier against Poland at Wembley but has nevertheless told his opponents to "bring it on".
Hodgson’s men currently top Group H with 19 points – one ahead of second-placed Ukraine who travel to San Marino, who have never won a qualifier.
Should the Three Lions fail to win and Ukraine beat San Marino, England will have to reach next year’s World Cup via a two-legged play-off.
"We've prepared. We’'e ready. Bring it on," Hodgson told reporters.
With echoes of failing to qualify for Euro 2008, Tuesday's match is arguably Hodgson’s most important yet and the England boss knows the lead-up to kick-off will be anything but comfortable.
"I'm a worrier," he added.
"Anyone who works in football is a worrier. It won't be my best night's sleep because of all of my waking thoughts are around England versus Poland. It's not good we’ve got to wait until Tuesday evening for it.
"But I have great faith and trust in the players. I couldn't be putting a stronger or more confident bunch of players onto the field.
"But football is not a science. Things can happen in games you don’t want to happen."
England are unbeaten since losing to Sweden last November and have only two competitive matches in normal time since the 3-2 defeat to Croatia in 2007.