Hull City suffered their second defeat of the Premier League season at home to Arsenal, losing 4-1.
Newcastle United lost 2-0 to Wolverhampton Wanderers.
The Black Cats have managed just one point from their first four games.
The 29-year-old looks set to hand the Premier League side a major boost.
The striker departed Anfield to join Crystal Palace this summer.
Newcastle came crashing back down to earth as they were beaten 2-0 by Wolves.
The New Zealand international scored again this weekend.
Mark Warburton's Ibrox side Glasgow Rangers dropped more points recently.
The Senegal midfielder has been brilliant this season.
The Liverpool forward is lacking his best form at present.