Bayer Leverkusen attacker Moussa Diaby remains a target for major clubs across Europe.
Diaby attracted big transfer interest over the summer, but ultimately remained with Bayer.
English reporter Graeme Bailey is reporting Chelsea, Arsenal, Tottenham Hotspur, Manchester City and Newcastle United all posted scouts to watch the 23-year-old when the Werkself defeated Atlético Madrid 2-0 in the Champions League.
Newcastle particularly showed interest in the winger last summer, who chose to stay in Leverkusen.
His contract with Bayer runs until 2025.