The Premier League is back for Match Day 28 of the 2017-18 season, which will feature a highly intriguing mid-table clash.
It took 10 minutes for either goalkeeper to be forced into a save as Martin Dubravka, coming off an impressive debut against Jose Mourinho's men, sprung to his left to parry Callum Wilson's effort on the turn.
Steve Cook scored a 92nd-minute victor in Bournemouth's 1-0 win at Newcastle in November.
Ritchie then curled wide from 25 yards out as Newcastle continued in the ascendancy.
The Cherries had started brightly, with Joshua King, in particular, looking like a real live wire in the first few minutes, but after taking the lead it was the Magpies who looked confident and in control.
Gayle netted his second on the stroke of half time, with Paul Dummett picking out Ayoze Perez from a deep position, allowing the Spaniard to thread a low pass to the striker in front of goal, gifting him with a tap-in.
Newcastle United controlled the match into the second half, but Bournemouth showcased more danger in this half.
Adam Smith pulled one back for the Cherries with 10 minutes to go, before Dan Gosling, a former Newcastle player, equalised in the closing stages of normal time to devastate his old side.
Newcastle are three points behind Bournemouth in 13th spot.
Benitez expects Slimani to feature for Newcastle sooner rather than later but is pleased with the quality of players at his disposal, having produced a 1-0 league victory over against Manchester United this month.