Over 100 players in the 2026 World Cup have been booked for yellow cards, with Paraguay recording at least five yellow cards in the first round.
After a wasteful first half with both teams missing several chances to break the deadlock, Barnes opened the scoring for the hosts in the 63rd minute.
Cameroon finished third on four points, two points below second-placed Switzerland, who defeated Serbia 3-2.
The Magpies dominated the game from start to finish but opened the scoring in the 58th minute through a Fabian Schar rocket that went in off the upright.
PSG were missing a number of stars, with Lionel Messi joining the injured Neymar on the sidelines after a recent positive COVID-19 test.
