Who will be England's half back pairing?
Six months ago you would have thought that England had their World Cup half back partnership sorted with Leicester pair Ben Youngs and Toby Flood at the helm.
The two men looked to be a certainty with terrific form at club level and a burning desire to do well for their country.
But after encouraging displays against Wales, Danny Care and Jonny Wilkinson have brought themselves into serious contention.
England head coach Martin Johnson will be pleased to have a number of options in his squad as this is something needed to win a World Cup, but he does face the dilemma of his starters at half back.
Flood has always been questioned over his playmaking abilities and with 'fan-favourite' Wilkinson looking sharp it could be a close battle for the No10 jersey.
Meanwhile, scrum-half Youngs has recently undergone keyhole surgery on his left knee, and although he will be fit for the World Cup it could be a major risk.
With these doubts in mind, Johnson would have been extremely happy with what he witnessed from Care and Wilkinson against Wales.
Wilkinson was named man of the match and it was the calm and experienced manner of his game, which led to England dominating the first 50 minutes and stopping a Wales comeback late on.
It wasn't necessarily his tactical kicking that made him shine, although there were some sparks of brilliance with delicate chips and deft cross-kicks.
The 32-year-old showed his true presence by still having the skill to grab points when they are most needed. He sent over two drop goals on either side of half-time and they proved to be vital points.
England won the game by four points and Wilkinson's two drop goals contributed six. He brings steadfastness and reliability with his points-scoring which no other player, with the possible exception of New Zealand's Dan Carter, can offer.
Flood will be determined, that he, not Wilkinson will be at No10 for England's opening World Cup game, and he will get his chance this weekend when he starts against Wales in Cardiff on Saturday. This is a huge game for Flood as any little slip will most probably lead to Wilkinson taking over.
After the dramatic World Cup winning drop goal from Wilkinson in 2003, he has gone on to become a very popular figure for all English rugby fans, and this is something Flood feels is against him.
"There will always be 58 million people in England thinking I shouldn't be in charge of the 10 shirt," said Flood.
He does have a strong argument to make, but actions speak louder then words and as Wilkinson has proved his worth, Flood needs a big performance of his own.
The battle for the No9 shirt has been even more of a hot topic as Care and Youngs have been challenging each other for some time.
Youngs likes to play with instinct rather than sticking to structure and this unpredictability has most definitely contributed to his success for England. The fact that the young scrum-half also picked up the Leicester Tigers Player of the Season for the 2009/10 season speaks volumes for his progress.
Although Youngs is very good at making the correct decisions, Care has been fantastic for Harlequins and he seems to be more reliable.
The reliability of Youngs was brought into question when he was sent to the sin-bin in England's defeat by Ireland in March. He played no further part in the game as Care came on to replace him.
It's a very tough decision for Johnson as there is not a lot between both men and this is something 2003 World Cup-winning scrum-half Matt Dawson agreed with.
He said: "Ben seems to be good at making big decisions while Danny has made the most of his opportunities. There is not a lot between them.
"It's excellent news for Johnno as the worry was that England would be a little short in this department after the enforced retirement through injury of Leicester's Harry Ellis.
It certainly is good news for Johnson as he has a lot of talent to choose from, as you can't also forget Joe Simpson who has been impressive at Wasps and Paul Hodgson from London Irish.
The half back positions could be the difference between success and failure as these two players provide the pivotal link between the forwards and the backs. Their understanding, communication and cohesion is an essential component for success on the rugby field.
With Johnson knowing how vital this is, it will be very interesting to see his starting line-up on September 10, but one thing is for sure, there is certainly enough quality there.
