Robert Lewandowski was crucial in Poland qualifying for Euro 2016, netting 13 goals in 10 games to get his country to the championship. But in France he has failed to score. His statistics are disappointing: no goals, two attempts on target, three attempts off target and three blocked attempts.Nevertheless, coach Adam Nawalka is keeping faith with his striker and skipper - and pinning hopes on him for victory tonight against Portugal in the first of the Euro 2016 quarterfinals.Lewandowski's best chance in the opening minutes against Ukraine flew over the crossbar.Beyond a second chance in that game when he turned his defender and shot just wide, he was barely inside the penalty area.Against Switzerland in the last 16 he never looked like scoring.But asked whether the team was concerned about their captain's failure to hit the target, goalkeeper Lukasz Fabianski said: "No, we're not worried at all. You've got to say Robert does his job as well."That job is a little different from the role he plays at Bayern Munich, where he is surrounded by big names such as Thomas Mueller and Mario Goetze and a culture of attacking football.For Poland, Lewandowski is the heartbeat of a team which, although full of running energy and collective spirit, do not have a creative playmaker.It focuses on defending, and apart from a wonder goal by Switzerland's Xherdan Shaqiri, the Polish defence has not been breached.Even the free-flowing world champions Germany never looked like scoring when the two sides met in the groups stages.As the leader, Lewandowski works for the team as a defensive No10, rather than battling to get himself a goal. It is less glamorous but certainly effective.Against Northern Ireland and Germany in the group stages he dropped off to collect the ball and defended from the front, tracking back and chasing down opposition midfielders.Against Switzerland his harrying could be seen throughout."Even in the first minute of the game against Switzerland, we created something from his pressure. That put them under a stressful situation," Fabianski said."That's what he gives us. Even though we're not creating as much as we would like for him."Lewandowski's labours have created more space for partner Arkadiusz Milik, whose crisp finish against Northern Ireland won the game, and for his former Dortmund club mate Jakub Blaszczykowski, who has netted twice so far."It's a great responsibility. When I first put on the armband, I didn't know that this small accessory could make such a big difference," Lewandowski said."You need to know how to cope with it. Not many people know how much commitment and effort is required, not just physical, but also mental." ..