Everton were beaten 5-0 by Chelsea at Stamford Bridge on Saturday.
West Ham have managed just two wins at home all season.
Newcastle United beat Cardiff City 2-1 in the Championship.
QPR have parted company with their manager after a draw saw the club fall to 17th in the table.
Cristiano Ronaldo? Luis Suarez? Neymar? Sergio Aguero? Hartson reckons this midfield dynamo is better than all of them.
The Chilean has scored eight goals in all competitions for Arsenal this season.
Liverpool have conceded more goals than any of the Premier League's top five teams.
Arsenal and Tottenham Hotspur will face each other in the North London derby on Sunday.
Leeds United won against Norwich City in the Championship on Saturday.
The winger made the move from Crystal Palace to Everton in the summer transfer window.