Greek hero Giorgos Karagounis is wary of what his former club coach and current Japan manager Alberto Zaccheroni may plot when the two sides clash at the World Cup in Natal on June 19.
Karagounis, Greece's most capped player with 134 appearances who played for Zaccheroni at Inter Milan, featured for Fernando Santos' side on Tuesday in a 0-0 draw with Nigeria at PPL Park, home to Major League Soccer's Philadelphia Union.
Greece started with a second-string lineup, having just played Portugal away on Saturday in another goalless stalemate. But the former European champions finished with a team that closely resembled their best, showing the resilience and directness that could trouble Japan in Brazil.