Manchester City manager Roberto Mancini admitted his side were "lucky" after Sergio Aguero's late strike gave City their first win of the campaign.
The Argentinian striker poked the ball home with the last kick of the game, having latched on to David Silva's deft flick from Pablo Zabaleta's cross.
City now sit four points behind Group A leaders Bayern Munich, and just one behind Napoli ahead of their next European match at Villarreal.
Manchester United also secured the first three points of their European campaign, with two Wayne Rooney penalties sealing a win at Galati.
Tonight, Arsenal are in action, looking to overhaul Marseille at the top of Group F with a win at the Stade Velodrome in France tonight.
Thomas Vermaelan, who signed a new contract with the club yesterday, remains on the sidelines alongside the injured Kieran Gibbs.
Andre Santos is expected to take his place at left back, while midfielder Aaron Ramsey will likely start after recovering from a hamstring strain.
Chelsea welcome Genk to London tonight, with Andre Villas-Boas confident of a win that will strengthen his side's position in Group E.
The Chelsea manager hinted at possible squad rotation tonight, with Fernando Torres and Nicolas Anelka likely to start in attack for the Blues.
Brazilian Ramires will miss out, having picked up a knock against Everton on Saturday, while John Terry and Frank Lampard could both be rested.