Feyenoord's bid to start the campaign with back-to-back wins was frustrated by 10-man Heerenveen as they were held 1-1.
Sky Sports understands Stoke and Sunderland are among a host of clubs tracking Swedish winger Nabil Bahoui.
FC Twente needed a late equaliser from Youness Mokhtar to salvage a 1-1 draw at Cambuur Leeuwarden.
Sky Sports launches new channel dedicated to European Football - Sky Sports 5.
Real Madrid's Super Cup clash with Sevilla starts a stunning season of live European football on Sky Sports 5.
Wolves are lining up a move for Dutch winger Rajiv van La Parra, Sky Sports understands.