Adam Lallana was the player who did most to boost his World Cup hopes in England's 1-0 victory over Denmark, according to Sky Bet.
The Southampton star, a second-half substitute, set up England's winner, scored by Daniel Sturridge, and generally impressed after replacing Jack Wilshere.
Sky Bet cut Lallana from 10/1 to 6/1 to start England's opening game in Brazil - against Italy in Manaus on June 14 - while they also trimmed his odds to make the 23-man squad from 1/2 to 2/5.
Sky Bet trader Joe Petyt said: "An uninspiring friendly won't have told Roy Hodgson much about his squad that he didn't already know.
"The young players like (Raheem) Sterling, Lallana and (Luke) Shaw certainly didn't look out of their depth but against a poor Danish team you wouldn't have expected anything else.
"With a few places in the squad still up for grabs the players' fate is going to be decided by their form in the Premier League in the next few months."
Shaw is 2/1 to make the squad after making his debut as a sub, while Sterling is 4/6 in the same market after making his first start for his country.
Sky Bet's 'to start the first game' betting suggests this will be the team which faces Italy: Hart, Johnson Baines, Cahill, Jagielka, Johnson, Gerrard, Wilshere, Lampard, Rooney, Sturridge, Welbeck.
All are odds-on to play in the game except Lampard (6/4) and it is in midfield where one place looks up for grabs.
The Leeds-based firm also have Andros Townsend (13/8), James Milner and Michael Carrick (both 7/4) around the same price, and then come the hopefuls such as Alex Oxlade-Chamberlain (3/1), Jordan Henderson (4/1), Sterling (9/2), Lallana (6/1) and Ross Barkley (8/1).
As for the 23-man squad, to be announced on June 2, Sky Bet's prices suggest this will be it: Hart, Forster, Foster, Baines, Cahill, Cole, Jagielka, Johnson, Walker, Jones, Smalling, Gerrard, Wilshere, Milner, Carrick, Lampard, Lallana, Townsend, Henderson, Oxlade-Chamberlain or Sterling, Rooney, Sturridge, Welbeck.
However, it almost certainly has too many midfielders in it and not enough forwards.
Another attacker and one less midfielder would appear more likely in reality which would bring the likes of Rickie Lambert (7/4), Andy Carroll (5/2), Jay Rodriguez (7/2) and Jermain Defoe (4/1) into the reckoning.
England remain 28/1 to win the World Cup.
Their next action will be a home clash with Peru at the end of May - the first of three pre-World Cup friendlies which will also see them face Ecuador and Honduras in Miami.
Sky Bet have England at 5/2 to win all three games.
Brazil, who beat South Africa 5-0 on Wednesday, are the 3/1 favourites to win the tournament on home soil.
Neymar scored a hat-trick in that match and is a 14/1 shot for the Golden Boot. Argentina's Lionel Messi is the 7/1 favourite in the market.