ARSENE WENGER was delighted with his side's forward play at Leicester at the weekend and slightly dismayed by the defending.
It added up to a thrilling 5-2 win but he knows when you move up the Champions League that sort of shoddiness will be punished more severely.
Aand after losing at Dinamo Zagreb in their Euro opener after Olivier Giroud was sent off the Gunners must take the points when Olympiakos visit the Emirates.
The sides are no strangers having been paired together in four of the last seven seasons. Arsenal have won all three at home, scoring seven, and have picked up full points in their first Emirates Champions League clash in the past 11 season.
Olympiakos did net on their last two visits to north London so both to score is a possibility at 10-11 with boylesports.
Chelsea are the other English team in action as they head to Jose Mourinho's former club Porto.
The Blues easily beat Maccabi 4-0 in their opener but were poor at Newcastle on Saturday before a thrilling finish earned them a 2-2 draw.
Their tie in Portugal is tough to call as Porto have an excellent home record and will have their fans at 13-8 with Betfred.
For me the Mourinho factor is massive because there's no way he wants to go back home and lose and his side is boosted by the availability of Diego Costa who is serving a domestic ban.
Cameroon international Vincent Aboubakar, signed in the summer from French side Lorient, has netted three this season and could be Porto's biggest goal threat. He is 13-5 with Paddy Power to score.
For a 7-4 treble with Arsenal add Barcelona, even without Lionel Messi, at home to Leverkusen and Bayern Munich minus one against Zagreb.
Brazilian striker hit a double in Spain and is 4-1 at 888sport to score first.
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