The Magpies travel to Vicarage Road this weekend as they look to secure their place in the top half.
A win for Watford will guarantee their Premier League survival, so both sides still have something to play for in the capital.
After a good run of form, Newcastle have lost their last two, including a 1-0 loss to bottom of the league West Brom last time out, so boss Rafa Benitez will be eager to get back to winning ways.
Watford have won their last three games against Newcastle, however, the Hornets are without a win in their last seven games, and will need to improve their performances to beat the Geordies.
The North East club have never won at Vicarage Road in the top flight, and they will be without striker Islam Slimani through suspension, plus injuries to Christian Atsu and Mikel Merino.
Here are some of the key battles which will help decide who comes away from Vicarage Road with the points…