West Bromwich Albion and West Ham United both recorded comfortable wins on Wednesday night, but the problems mounted for Blackburn Rovers boss Steve Kean.
Zoltan Gera made his return to action for West Brom as they beat Copenhagen 3-0 in Denmark.
A second-half own goal by Phil Ofosu-Ayeh and two later strikes from Championship play-off winner Ricardo Vaz Te earned West Ham a 3-0 win over Rot-Weiss Erfurt in Germany.
Blackburn, who were relegated from the Premier League last season, lost 1-0 at League Two Rochdale as Joe Thompson scored the only goal and travelling fans again voiced their dissatisfaction at Kean.
Bolton Wanderers concluded their three-game tour of Scotland with a 1-1 draw against Falkirk as Chris Eagle's excellent volley cancelled out Lyle Taylor's opener.
Derby County opened their pre-season campaign with a 2-1 reverse to Mansfield Town at the One Call Stadium.
Aberdeen went down 1-0 to Werder Bremen after a creditable performance in Germany, where Eljero Elia scored the only goal of the game.
Two goals from Michael Chopra gave Ipswich Town a 2-0 win over South East rivals Cambridge United.
Port Vale hammered Athlone Town 5-0, with Tom Pope scoring four times, while, in contrast, Notts County and Alfreton Town played out a goalless stalemate, and Huddersfield Town drew 1-1 with Kilmarnock.