Arsenal manager Arsene Wenger and Chelsea striker Fernando Torres enjoyed differing fortunes on the former's 64th birthday and the latter's 100th start for Chelsea in Champions League soccer action yesterday.
Arsenal went down to their first defeat since the opening day of the English Premier League campaign, as last season's beaten finalists Borussia Dortmund beat them 2-1 at the Emirates Stadium.
Olivier Giroud cancelled out Henrikh Mkhitaryan's opener before Polish striker Robert Lewandowski scored the winner, although he was fortunate to be on the pitch having elbowed Laurent Koscielny earlier in the second half.
After three rounds of games, Dortmund top the Group F table on goal difference from Arsenal, while Napoli joined them on six points after disposing of Marseille 2-1 in France.
Wenger said he hadn't seen the elbowing incident clearly enough to comment but accepted that his side had not been at their best.