Watford have enquired about taking Aaron Lennon on loan from Everton.
The 30-year-old missed the finals stages of last season after suffering from a stress related illness.
He has returned to fitness in pre-season and looked sharp in early friendlies scoring against FC Twente.
Birmingham City have also expressed interest in the former England international.
Everton are willing to listen to offers for the former Tottenham winger, who has made 58 appearances after first joining on loan in 2015
Watford have already signed Will Hughes, Nathaniel Chalobah, Daniel Bachmann and Kiko Femenia.