Newcastle registered a surprise 2-1 victory over Tottenham Hotspur away from home at White Hart Lane in North London on Sunday evening.
Meanwhile, West Brom held Liverpool to a 2-2 draw away from home at Anfield.
Both Tottenham and Liverpool were involved in the Europa League last week, and former Newcastle and Queens Park Rangers midfielder Barton has suggested that a possible reason behind their slip-ups on Sunday evening.
Mad game football. Some result for Newcastle. West Brom winning at Anfield. Europa League anyone?— Joseph Barton (@Joey7Barton) December 13, 2015
As I say that Liverpool score...— Joseph Barton (@Joey7Barton) December 13, 2015
Newcastle are 15th in the Premier League table at the moment with 16 points from as many matches, two points above the relegation zone.
West Brom currently find themselves 13th in the standings with 20 points from 16 games.