United States Under-20 international goalkeeper Zac MacMath is to spend three weeks training with Everton.
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MacMath, 21, who has had similar stints with Everton in each of the last two years, will use the time to sharpen his skills following the conclusion of the regular MLS season, which came to an end last month.
The Florida-born keeper, who plays for Philadelphia Union in Major League Soccer, was due to fly to Merseyside on Monday and will train alongside Everton's Tim Howard, the United States' first-choice keeper, at the club's Finch Farm base.
Philadelphia Union confirmed MacMath's Merseyside trip in a statement on their website, which added that striker Cristhian Hernandez will be training with Real Sociedad under a similar arrangement.
The statement read: "Goalkeeper Zac MacMath and forward Cristhian Hernandez will continue to hone their skills in the off-season with European clubs in England's Premier League and Spain's La Liga, the club announced today. MacMath and Hernandez will depart today for three-week training stints with Everton and Real Sociedad respectively."
MacMath is not on trial as such, but manager David Moyes will take the opportunity to assess the goalkeeper's progress.
The keeper established himself as the Union's first-choice during the season just completed, keeping eight clean sheets in a side who finished eighth out of 10 teams in the MLS Eastern Conference.