Everton manager Roberto Martinez felt mental fatigue played a part in Saturday's disjointed 4-1 win at home to Fulham, while Spaniard Gerard Deulofeu suffered a hamstring tear ruling him out for several weeks.
Manchester City asserted their Premier League title credentials with an extraordinary 6-3 defeat of leaders Arsenal, while Chelsea edged Crystal Palace 2-1 to move second.
Mesut Ozil gave Arsenal the lead in the 80th minute but Gerard Deulofeu equalised four minutes later to earn Everton a point, while Fulham picked up their first win under manager Rene Meulensteen with a 2-0 victory over Aston Villa.
Fulham downed Crystal Palace 4-1 Monday night, fueled by an excellent volley from Pajtim Kasami who levelled matters after Palace took an early lead.
Aston Villa signed Bulgaria winger Aleksandar Tonev from Polish club Lech Poznan after passing a medical and agreeing personal terms with the English Premier League side.
Queens Park Rangers fell behind to Fulham early on and battled back to make for a nervous ending at Craven Cottage, but the hosts held on for a thrilling 3-2 win despite playing a man down for the final eleven minutes.