Arsenal winger Christos Tzolis produced another quality performance during the pre-season friendly against Borussia Dortmund at the Emirates Stadium on Sunday. The Gunners suffered a second-straight loss in pre-season after a 3-2 defeat to Dortmund. The Greek registered a goal and an assist in his previous two outings against Girona and Real Betis, respectively. Tzolis produced the assist for Ethan Nwaneri’s goal and also won the penalty converted by Viktor Gyokeres before his late substitution. Arsenal start their Premier League title defence at home against Coventry City on Friday, August 21.