Taher Mohamed Taher's header and a late goal from Hossam Hassan were not enough as Smouha secured a vital win over Al Ahly.
The Red Devils are in a great run of form since the start of the league season with five wins out of five games, leading the table with two points clear.
Carteron praised his play-maker after he started the game against Smouha and helped the White Knights achieve an important 2-1 win before the Cairo derby on Monday against Al Ahly.
Smouha were the first team in the league to get the three points against Al Ahly this season, having secured a late 2-1 win over the Red Eagles.
The Red Eagles have been struggling since they won the derby over Zamalek on 18 April, having achieved just 7 points from their last five matches.
The loss to Smouha is Al Ahly's first defeat in the Egyptian League since the appointment of Pitso Mosimane as Al Ahly's head coach.
It was clear that Al Ahly will face difficulties in the match despite going to the game in high spirits after a vital win over Zamalek in Cairo derby.
Zamalek Club announced, through their official website, that there will be a friendly match with Smouha in their preparation camp held in Alexandria.
Al-Ahly former striker and currently Smouha player, Salah Mohsen, revealed his talks with Liverpool's player Mohamed Salah regarding joining the English team.
Rene Weiler, Al Ahly’s manager, announced Al Ahly’s squad for their upcoming match against Smouha Sporting Club in the 18th fixture of the Egyptian Premier League.
Without notice, Hamada Sidki left the Sudanese club, Al Hilal, after only 25 days of taking the position, in order to take over the leadership of the Smouha.
Al Ahly started their journey to defend the Egyptian League title by defeating Smouha 1-0 in the match gathered both teams at Borg El Arab stadium on Monday.
Al Ahly start defending their title Egyptian League Championship against Smouha at 5:30 pm on Monday at the Borg El Arab Stadium in Alexandria as part of the first round of the league.
Geraldo continued Al-Ahly’s habit to score late winning goals which gained many points for the team this season.
Al Ahly's coach, Martin Lasarte, will not make any changes in his starting line-up which faced Al Negoum in his important clash against Smouha.
Al Ahly prepare for their important clash against Smouha on Saturday in the 32nd round of the Egyptian League.
Al-Ahly achieved their 14th title in the competition and their fourth title in the last five years.
Zamalek hopes to return to the Egyptian League summit after they lost it for the first time on Tuesday when their arch rivals, Al-Ahly, defeated Al Ittihad 2-0.
Smouha SC appoint on Saturday Hossam Hassan as a manager to follow former coach, Adel Abdel Rahman.
Geraldo appeared in the club squad for the first time since he joined Al-Ahly from Primeiro de Agosto.