Paris Saint-Germain (PSG) fans slammed forward Kylian Mbappe for being selfish and not showing enough respect to his teammate Lionel Messi.Paris Saint-Germain could only manage a draw as they faced AS Monaco at home in Ligue 1 on August 28.Kevin Volland gave the visitors the lead in the 20th minute of the game. Neymar Jr. rescued a point for the Parisians with a well-taken penalty in the 70th minute of the game.However, Mbappe was the subject of criticism from fans for an incident in the game. He opted to shoot from outside the box in one instance rather than choosing to pass to Messi, who was free and could've scored.Fans were also enraged by manager Christophe Galtier's decision to take off Messi in the 87th minute with the team needing a goal.Many believe the Argentine was having a much better game than Mbappe. They believe the 2018 World Cup winner should have been subbed off instead of the seven-time Ballon d'Or winner.Fans took to Twitter to share their disappointment at Mbappe and Galtier. Here are some of their reactions:Marshall@TheMessiguyyMessi subbed out but mbappe stays on the pitch it shows you the power he has over that club53757Messi subbed out but mbappe stays on the pitch it shows you the power he has over that clubR @Lionel30iI didn’t think I could witness a worse performance than Mbappe’s last home game but I was definitely wrong33222I didn’t think I could witness a worse performance than Mbappe’s last home game but I was definitely wrongSara 🦋@SaraFCBiNone of the PSG have been very impressive today, but you can’t tell me Messi was worse than Mbappé to be subbed off.76452None of the PSG have been very impressive today, but you can’t tell me Messi was worse than Mbappé to be subbed off.¹⁰@SxrgioSZNMbappe missing from here the day after Haaland scores a hat trick 181972Mbappe missing from here the day after Haaland scores a hat trick 😂😂😂 https://t.co/Ae26oX6sGu🅱️@CityReportBenHaaland is so clear of Mbappe50425Haaland is so clear of Mbappe https://t.co/gIbvcF1A38SK10 𓃵@SK10FootballMbappe is the most selfish player in football history.Agree or argue with the wall26930Mbappe is the most selfish player in football history.Agree or argue with the wallZiad is NOT in pain @Ziad_EJMessi with a great game so far while Mbappe and other were playing terribly, but Messi comes off?No words.26515Messi with a great game so far while Mbappe and other were playing terribly, but Messi comes off?No words. https://t.co/5jyol7kxGAmessito🥷🏽@lapulgasantosMbappe has been poor the whole game but yet the coach chose to take Messi out smh33Mbappe has been poor the whole game but yet the coach chose to take Messi out smh https://t.co/GK1DuCrA4e🇲🇽@FutbolFaxMbappe I swear I’ve never seen you score from outside the box why tf would you shoot instead of pass to an open Messi 12416Mbappe I swear I’ve never seen you score from outside the box why tf would you shoot instead of pass to an open Messi 💀NF@nikfcb_Lionel Messi was the one who got subbed off, not Mbappe.493Lionel Messi was the one who got subbed off, not Mbappe. https://t.co/YSw4nRcCxtLionel Messi and PSG have managed a good start to the seasonPSG star Lionel MessiPSG have gotten off to a great start to their Ligue 1 campaign even though they could only draw against Monaco on Sunday. The Parisians have managed 10 points from their first four league games of the season, scoring 18 goals in the process.Marseille and Lens have also managed the same number of points so far this season. However, Christophe Galtier's men are ahead in the standings due to their superior goal difference over the two clubs.Neymar has been absolutely sensational for Paris Saint-Germain so far this season. The Brazilian has contributed 14 goals from five games across competitions this season. Eight goals and six assists in only five games mark a remarkable start to the forward's campaign.Lionel Messi, meanwhile, has had a good start to his season as well. In four games, the Argentine maestro has scored four goals and provided two assists.He endured a difficult season last term after arriving from FC Barcelona. He scored 11 goals and provided 15 assists in 34 matches across all competitions.However, the little magician is looking like his usual former self this season. Whether he can replicate the lofty standards that he set during his time in Spain remains to be seen.With their front three firing on all cylinders at the start of the season, PSG fans will hope to have a successful UEFA Champions League campaign this term.