The Brazilian set up Edinson Cavani to make it 2-0, before the Uruguay global fed Neymar for his first goal in PSG colours.
Cavani returned the favour for Neymar late on, selflessly teeing up the former Barca man to poke home the first of what looks likely to be many goals for Paris (82').
Ikoko put through his own network in the 32nd minute to give PSG the lead, before Cavani added the second in the 52nd minute.
"It is always very important to score, not just in the first game".
Neymar then netted the third and winning goal for Paris Saint Germain in the 82nd minutes.
After the first half finished 0-0, Jordan Ikoko scored a barely believable own goal seven minutes after the break.
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The No. 16-ranked Gators open the season against MI in the Advocare Classic on September 2 in Houston against No. 9 MI . Desir-Jones say playing time in two games last season on the offensive line, bu switched to defensive line this season.
He had taken the place of Javier Pastore in the Paris side in the only change from last week's 2-0 win over Amiens, completing a 350 million-euro front three with fellow South Americans Cavani and Angel Di Maria.
In the 35th minute, he scooped a delicate cross above the defence but Marquinhos's header crashed onto the bar.
PSG are second in the fledgling table, behind Lyon on goal difference.
Despite Monaco fans' concerns that French prodigy Kylian Mbappé might be leaving, they know they can still trust Radamel Falcao after the Colombian striker hit a hat-trick.
The first notice of Neymar's threat was served five minutes later as he jinked inside on his right foot before blasting over from 20 yards, and he nearly created the opener as his teasing cross was thumped against the angle of post and crossbar by an unmarked Marquinhos.