The former Nottingham Forest wideman has been in blistering form all season and also shone when the Hammers beat Chelsea in the EFL Cup back in October.
The 26-year-old has netted eight goals this season from a variety of positions which makes him the club’s top scorer, so Slaven Bilic will be keen to keep hold of him.
With a contract that runs until 2020, the Hammers will not be forced into letting him go unless Chelsea come up with a ridiculous offer for a player who cost just over £8m in the summer of 2015.
Bilic will be concentrating on keeping the likes of Antonio and Dimitri Payet at the club as well as adding new players while the transfer window is open this month.
Motherwell held Ladbrokes Premiership leaders Celtic to a goalless draw despite playing for more than half the match with 10 men at Fir Park.
Michy Batshuayi's cheeky backheel was enough to give Borussia Dortmund a 1-0 win over Hannover 96 at Signal Iduna Park on Sunday, lifting them within a point of second-placed Schalke.
Eintracht Frankfurt boss Niko Kovac felt his side could have scored more goals following their 3-0 defeat of Mainz on Saturday.
West Brom manager Alan Pardew refused to fault his players' efforts after a heartbreaking 2-1 loss to Bournemouth that dashed their already slim survival odds.