Real Madrid goalkeeper Navas was completely caught out moments later, though, as Rashford unleashed a powerful drive from 25 yards for his third worldwide goal.
Just 11 days before their Group G opener against Tunisia, Thursday's sold-out Elland Road friendly was the last chance for the Three Lions to fine-tune before departing for Russian Federation. "There are a couple of places that always as a manager you are looking at who your better players are, but then form and physical condition means it always evolves, a football team is a moving, living beast".
And Rashford felt his performance in Thursday's game, in which Danny Welbeck headed in the second goal, was helped by his more carefree approach.
For England, their next match comes in Russian Federation against Tunisia on June 18 with clashes with Panama and Belgium to follow.
Gareth Southgate made 10 changes from the team that beat Nigeria 2-1 at Wembley on Saturday, with John Stones the only man to start both matches. "We will make a lot of changes and Trent Alexander-Arnold will get a debut".
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After the initial attempt to form a government failed, Mattarella picked Carlo Cottarelli as interim prime minister. The government is expected to win.
The former England boss instead feels Rashford will get his chance to star if the Three Lions progress to the knock-out stages, given that he impresses in the group games. "We're all proud to be Town fans and be part of the match day experience and were proud to be given the opportunity to play for England too!"
"Anything is possible. We have to go with the highest expectations".
But against Costa Rica, Rashford looked relaxed and confident on the ball, utilising his electric pace in the right moments but also toying with defenders as he stood on the ball out wide.
Costa Rica face tournament favourites Brazil as well as Serbia and Switzerland in Group E, and will need to show far more ambition once they get to Russian Federation if they are to replicate their heroics of four years ago.