#3 Robbie Keane
The Irishman is one of the biggest coups ever achieved by an ISL club. ATK have done a tremendous business in luring Robbie Keane to India with the 37-year-old already having offers from Europe and the MLS. Keane is a Premier League proven striker and has banged in goals for every club where he has featured. He is Kolkata's most expensive buy of the summer but a risk which may pay huge dividends.
One thing that Keane guarantees is goals and ATK needed that for their title defence. ATK have always had a brilliant striker up front with Keane set to be the most high-profile player to ever play for the two-time champions. The Irishman is a preseason favourite for the Golden Boot award and if that happens, ATK will have a good chance of retaining their crown.