The trainer has no concerns about his star man's lack of goals in France so far and urges fans to recognise his many other contributions leading the line
Poland boss Adam Nawalka singled out Robert Lewandowski for praise despite another goalless showing at Euro 2016, describing the striker as the team's "steam-powered locomotive".
Lewandowski looked bereft of confidence at the Stade Velodrome as Poland eased through to the last 16 thanks to a 1-0 defeat of Ukraine, Jakub Blaszczykowski scoring the only goal nine minutes after his introduction at half time.
Blaszczykowski's immediate impact was in stark contrast to Lewandowski's troubles, with the Bayern Munich man mired in a poor run of form having failed to score in six international appearances.