This time next season, Chelsea fans will have had roughly six months to consider if Christian Pulisic was worth £58 million.The 20-year-old joined the Blues from Borussia Dortmund in January, but was immediately loaned back for the remainder of the campaign.His season tally stands at five goals and three assists, almost half of which have come since agreeing his move to west London.Despite Pulisic’s obvious potential, a significant proportion of Chelsea fans aren’t sure what to expect from him.Well, one thing most football fans do know about the American winger is that he’s rapid.

Pulisic’s speed is sure to cause problems for Premier League defenders next term, not least those who aren’t particularly fleet of foot.

And he served up a perfect example of the threat he poses during a friendly between the United States and Ecuador in Orlando on Thursday night.

Penned in near the corner flag with Antonio Valencia for company, Pulisic opted to take on his marker rather than simply looking to deflect the ball into touch.

Despite being barely 15 minutes into the second half, the inbound Chelsea signing exploded away from the veteran defender with ease.

Check out Pulisic’s blistering acceleration from a standing start in the video below…

PULISIC'S BURST OF SPEED

You have to feel some sympathy for Valencia.

It’s the type of battle he would’ve relished ten years ago, but this must have been a stark reminder that next season would be his 14th in the English top-flight.

The US went on to beat Ecuador 1-0 courtesy of a fortunate goal from Gyasi Zardes with ten minutes left to play.

BRYAN MCBRIDE ON PULISIC

While Chelsea will expect Pulisic to be consistently more influential than he was at Orlando City Stadium, former Fulham striker Bryan McBridge doesn’t doubt he will prosper in England.

“With the speed of the Premier League, I think Christian Pulisic will fit in and settle in well. He adapted very well as a young player in Germany and in the Champions League. He hasn’t shown any weaknesses so far," McBride told us-bookies.com, via Goal.

“Right now, he’s probably not in the best form of his career as he isn’t playing each week, but the talent is there and his thought process is very quick.

“He’s a very mature young player and has a desire to continually improve. When you have that kind of mentality, you can deal with the physicality in the Premier League and at a team like Chelsea this will help him settle in.”