Atlético de Kolkata head coach Antonio Lopez Habas believes his team are facing their toughest examination yet when they take on table-toppers FC Goa in their 2015 Hero Indian Super League encounter at the Salt Lake Stadium on Sunday.Despite having lost three matches in a row at one point of their campaign, the defending champions currently lie third in the table and are one of the favourites to reach the semis at present with 17 points from 11 matches. Goa, on the other hand, are at the top of the table with 18 points from 10 matches, ahead of Delhi Dynamos FC goal difference and Habas acknowledged the Goan threat.“Goa is first in the league and we play against them. It is a more important game for us and I think the most difficult till now,” Habas told reporters on Saturday.However, Habas wasn’t overawed by their opponents, yet to register their first win against ATK. “Each game is a different game. Goa is in a great position but ATK is prepared to win,” he said.Sameehg Doutie, who scored and provided an assist in ATK’s 2-1 win against Chennaiyin FC, also addressed the press and said he wasn’t affected by the weight of expectations ahead of the game. “Obviously, it is one game at a time. We are more focused on the team. It’s not about me or other individuals, it’s only about the team.”The South African midfielder further shed light on how he got involved with ATK. “The coach and support staff brought me here. I have been training here. I have learnt a lot. It’s important to listen to the coach and understand what he wants. It then shows in training and shows on the field,” he said.Meanwhile, Habas also provided an update on the recovering Helder Postiga. “Postiga is not playing because he is injured. We are waiting for him. I need Postiga as much as I need others. I don’t know when he will be back,” he said. Habas also informed that Nato was back from national duty and was available for selection.