Fallen by the wayside lie Liverpool's Mohamed Salah and Hakim Ziyech of Ajax who both struggled at the end of a long season to inspire Egypt and Morocco respectively.
Both teams have been humbled, the big names left to take their summer break earlier than anticipated.
Nicolas Pepe, who scored 22 league goals for Lille last season, has yet to fire, although with his Ivory Coast side meeting Algeria in the quarter-finals on Thursday that could change.
The same can be said of Senegal forward Sadio Mane -- the Liverpool player is joint top-scorer with three goals but he has also missed two penalties and has looked rusty throughout.
That leaves the mighty Mahrez who will lead the Desert Foxes in their quarter-final against Ivory Coast on Thursday.
The Algeria captain has been in wonderful form, his touch and finish in the 3-0 win over Guinea in the last round indicative of a player brimming with confidence after helping Manchester City to the domestic treble in England.
According to the Algeria coach Djamel Belmadi, the right wing hasn't allowed that club success to go to his head.
"He is talented and plays for a big club but we mustn't put him under too much pressure. Riyad has no desire to have the status of star," said Belmadi after another Mahrez goal had taken Algeria to a 2-0 win in their opening game against Kenya.
It helps Mahrez that he is at the heart of a team whose parts are all functoning smoothly. They have won all four games so far, scoring nine goals and conceding none.
It is a measure of their depth in this tournament that should Mahrez fail, they can call on 22-year-old Napoli striker Adam Ounas who has scored three times already from just 87 minutes on the pitch.
"Algeria are so well organised, so compact, so 'guardiolesque' in the way they recover the ball," said experienced international coach Claude Le Roy on television on Tuesday.
"Perhaps it is the influence of Mahrez on Djamel (Belmadi)."
Now 28, Mahrez might easily be a world champion by now. Born in France, he declared instead for Algeria, the land of his parents, in time to play in the 2014 World Cup in Brazil.
That year he also made the move from Le Havre to English side Leicester City and played a massive role, including 17 goals and 10 assists, in guiding the Foxes to an astonishing and unlikely Premier League title in 2015-16.
His €67 million move to Manchester City a year ago launched him into a team of galacticos as Pep Guardiola's team won the Premier League, FA Cup and League Cup, Mahrez chipping in with 12 goals and 12 assists across all competitions.
As the Desert Foxes prepare for their meeting with Ivory Coast - a team that holds a 3-2 advantage in their seven previous CAN meetings - Mahrez carries the hopes of millions of Algerians across the world as they pray for their first continental triumph in 29 years.
Mahrez isn't shirking from the pressure. After the win over Guinea in the last round he was clear about the route ahead.