England beat Nigeria on Saturday 2-1 with Southgate trying out his three at the back formation, which Alexander-Arnold could be a vital part of in the right wingback role.
Alexander-Arnold debuted, and Henderson, who will play the pivot with Dier, showed his strength from the beginning.
The right wing-back, the youngest member of England's World Cup squad, looked comfortable in his new surroundings, confident and assured in possession (and when on free-kicks) and alert when defending. BBC say 4%, but should it be higher?
Rashford stood out in the opening 45 minutes, but every other player can also be pleased with their night's work.
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His sentiment was shared by rival Golden State Warriors guard Stephen Curry , who said in an interview: " I agree with 'Bron ". Kerr admitted that he was "blown away by the irony of the Eagles being disinvited".
Ruben Loftus-Cheek was bright in the early stages, bringing the ball forward from midfield with authority and playing a neat first-touch pass off his in-step after venturing to the edge of the Costa Rica box.
England have conceded just twice in their last seven games and haven't let one in during the opening 45 minutes in that run.
If we're not expecting Costa Rica to contribute, the [1.96] for Under 2.5 goals could be the way to go.
Unders had landed in the previous six England games although that included tight affairs against Brazil, Germany and Italy when more caution was needed. It was a wonderful strike for the goal and he worked incredibly hard for the team. The match starts at 21:00 on 7 June 2018.
Harry Kane averages better than a goal per game under Southgate so the 4/6 (anytime) or 12/5 (first) are both options but only if he forms a two-pronged attack with Vardy and is on from the beginning. Johan Venegas gave the Costa Ricans the lead 30 minutes in, before Joel Campbell doubled the lead just after halftime in the 46th minute and Francisco Calvo put it away in the 66th minute, giving the Costa Ricans the 3-0 final score line.
A sold out Elland Road was treated to its first England global since 2002 - and boy did the locals enjoy it.