Sources: USMNT goalkeeper Zack Steffen completes $10m transfer to Manchester City

The U.S. national team goalkeeper has completed his transfer to the Premier League champions, but is likely to be sent out on loan.

U.S. national team and goalkeeper Zack Steffen has finalized his transfer to after completing his medical and signing his new contract on Thursday, multiple sources have confirmed to Goal.

The 23-year-old goalkeeper will join the Premier League champions for a transfer fee of $7.5 milion (£6m) that could rise to $10m if Steffen reaches certain incentives.

With Steffen unlikely to succeed in his quest to secure a UK work permit, the American goalkeeper is expected to be sent out on loan, with side a leading candidate to be his next destination.

French club OGC Nice, which is coached by former boss Patrick Vieira, is another potential destination.

Steffen's transfer is one of the largest ever paid for an player, and has shattered the previous record for an MLS goalkeeper, which was the $3 million paid for Tim Howard in 2003.

Steffen is the latest MLS player to be acquired by Manchester City, which acquired former NYCFC winger Jack Harrison in January, as well as former Kansas City defender Erik Palmer-Brown, who signed on free transfer. Harrison is currently on loan with , while Palmer-Brown is currently on loan with Dutch side NAC Breda.

The 2018 MLS goalkeeper of the year, Steffen enjoyed a breakout year for club and country, emerging as the first-choice goalkeeper with the , and turning in several standout performances, including a strong showing in the national team's 1-1 draw with prior to the World Cup.

Though Steffen does not currently qualify for a UK work permit, he could re-apply in the summer, and may stand a better chance to secure one if he can maintain his hold on the starting USMNT job in this summer's Gold Cup.

With his former Columbus Crew coach, Gregg Berhalter, having been hired as the new U.S. national team coach, Steffen stands a good chance of holding on to the job, though he is facing good competition from goalkeeper Ethan Horvath.

Steffen's transfer to Manchester City comes four years after he left the University of Maryland as a 19-year-old to join German club SC . He endured an unhappy stint at Freiburg, leaving the German club after a year and a half to sign with the Crew.

Steffen is seen as a potential long-term option for City, which currently boasts Brazilian national team goalkeeper Ederson as its starter.

Steffen's passing ability and ball-handling skills, as well as his experience playing in a possession-based system with the Crew, should help him adapt to Man City's playing style and challenge for playing time once he is able to secure a work permit and join the first team.