They're locked at the top of the English Premier League football table and both Manchester United and Manchester City have also finished their opening European Champions League matches with 1-1 stalemates.
Manchester United veteran Ryan Giggs put the English football champions level with Benfica in Portugal, Giggs striking with the equaliser three minutes from half-time after Oscar Cardozo had put Benfica ahead in the 24th minute.
Manchester City were scoreless after 45 minutes of their Champions League debut at home to Italian club Napoli, then fell behind to an Edinson Cavani goal in the 69th minute - only for Aleksandar Kolarov to equalise five minutes later.
Draws too for Ajax and Lyon, and Lille and CSKA Moscow.
Off to a winning start are Spanish giants Real Madrid, 1-0 victors at Croatia's Dinamo Zagreb, Bayern Munich of Germany, heading off Villareal 2-0 in Spain, and Switzerland's Basel FC, 2-1 over visitors Otelul Galati from Romania.
The big upset of the day came from Turkish runners-up Trabzonspor, who humbled Inter Milan 1-0 at Rome's San Siro stadium.
Trabzonspor failed to initially qualify for Europe's elite tournament and are only in the competition after Fenerbahce were withdrawn because of match-fixing allegations, but they looked comfortable.
