Jakub Swierczok (Photo courtesy of J-League/Kyodo)

       TOKYO (Kyodo) -- The Asian Football Confederation provisionally suspended Nagoya Grampus forward Jakub Swierczok on Friday for testing positive for a banned substance during the Asian Champions League.

       The AFC said Swierczok's A sample came back positive for the as-yet unspecified substance following Nagoya's quarterfinal loss to South Korea's Pohang Steelers in Jeonju on Oct. 17.

       The 28-year-old Poland international will be suspended from all soccer activities until the AFC completes an investigation.

       Swierczok joined Grampus in July this year, midway through the J-League first-division season, going on to score seven goals in 14 J1 appearances.

       He helped the club advance to the ACL quarterfinals with a hat-trick in their 4-2 win over South Korea's Daegu FC in the round of 16 in September.

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