3) Nicolas Gaitan (Benfica)
One of the most outstanding players in Portuguese football at the moment, Benfica winger Nicolas Gaitan may be something of an ambitious target, but one that his fellow Argentine Mauricio Pochettino should certainly consider. The pacey and skillful wide-man has been terrific for Benfica, attracting interest from the likes of Liverpool and AS Monaco for much of this summer. Valued at around £30m, he may prove a little too expensive for Spurs, but could be worth pursuing if they remain serious about breaking into the top four in 2014/15.