Wojciech Szczesny kept a clean sheet as Roma won 1-0 at Genoa, thanks to an own goal by Armando Izzo.
Joel Campbell played 90 minutes before being substituted in Sporting Lisbon's 2-1 home win over Feirense. Bas Dost scored a double for the hosts, before Platiny pulled one back.
Calum Chambers played the full 90 minutes as Middlesbrough won 3-0 at home to Sheffield Wednesday in the FA Cup third round. Grant Leadbitter opened the scoring, before Alvaro Negredo and Marten de Roon sealed the Owls' elimination.Copyright 2017 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source