Martin Sorrell 'created a monster in advertising' and will be hard to replace, says telecom tycoon

Key Points
  • It won't be easy to replace Martin Sorrell at WPP, warned Egyptian billionaire Naguib Sawiris.
  • Sorrell "created a monster in advertising" and his success story will be "very difficult to replicate," Sawiris told CNBC's "Capital Connection."
Martin Sorrell created a 'monster in advertising' with WPP: Naguib Sawiris

The resignation of Martin Sorrell from his post as the chief of WPP is "a very sad event" and it will be a big challenge for someone to fill his chair, according to Egyptian magnate Naguib Sawiris.

"He's created a monster in advertising, he's created a success story that is very difficult to replicate," Sawiris, a billionaire who made his fortune building a telecommunications empire from the Middle East to South Asia, told CNBC's Capital Connection.

Sorrell is "a workaholic" who knows all his numbers and subsidiaries, said Sawiris, who owns a telecom company in North Korea and also has business interests in gold mining. "This is not the kind of guy you can replace and think the next CEO will do a good job."

Naguib Sawiris, chairman and chief executive officer of Orascom Telecom Media and Technology Holding.
Diego Levy | Bloomberg | Getty Images

Sorrell, credited for turning WPP into the world's biggest advertising agency, quit on Saturday amid allegations of personal misconduct. In a statement, the 73 year-old businessman said, "WPP is not just a matter of life or death, it was, is and will be more important than that."

Chairman Roberto Quarta will take on the role of executive chairman until a new CEO is found.

"I hope that his legacy doesn't fall by this disruption," Sawiris said, adding that he believed WPP should consult Sorrell on choosing the next CEO. If a successor is chosen abruptly, that could be "very dangerous," the Egyptian billionaire cautioned.

During his three decades in the industry, Sorrell developed a reputation for strong opinions and an autocratic management style.