Manchester United have confirmed one more summer signing in the form of FC Zurich youngster Saidy Janko after the 17-year-old impressed the club on a trial this summer.

The club have snapped up the teenager for a fee reportedly in the region of £700,000, joining Guillermo Varela and Marouane Fellaini as the club's incoming transfers this summer.

The Switzerland under-18 international of Gambian decent primarily plays at right back but can be utilised in a number of positions up and down the right flank. The teenager impressed United scouts at this year's FIFA Blue Stars Tournament when he played against a United Academy XI, seemingly doing enough to earn himself a deal with the Premier League champions.

Janko is unlikely to be involved in the club's first team anytime soon, with the club suggesting through their official website that the teenager will be given the chance to make his mark in the club's youth ranks.

After a summer that promised much, the Premier League champions were only able to add one senior player to their ranks with both Janko and Varela not expected to feature for the first team this season.

Marouane Fellaini was signed from Everton for a fee of £27.5m in a frantic deal that ran close to Monday night's deadline, but the club failed to conclude a deal for Athletic Bilbao midfielder Ander Herrera and a loan move for Real Madrid full back Fabio Coentrao.

The farcically mismanaged deadline day efforts were the latest in a string of failed attempts from United to strengthen their Premier League winning squad. The tone was set earlier in the summer during the club's ambitious pursuit of Cesc Fabregas, where the club persisted with a succession of bids over a prolonged period of time despite it being abundantly clear the Catalonian midfielder had no intention of leaving the Nou Camp.

Another deadline day bid for Real Madrid midfielder Sami Khedira and a reported effort to lure Wesley Sneijder from Galatasaray added to United's woes, with the club now likely to look into their inability to procure new players over the summer.