Kolkata: Defending ISL football champions Atletico de Kolkata on Tuesday received a big blow to their campaign as their marquee player Helder Postiga was ruled out for three to four weeks.

The three-time Portuguese World Cupper, who made a stunning debut for ATK scoring a brace in their 3-2 win over Chennaiyin FC in ISL opener October 3, today flew back home to treat his injury under his personal doctor.