Seven times Formula One world champion Michael Schumacher, who came out of retirement last year, has lost the “edge” that had separated him from the rest at his peak, according to his rival since karting days and fellow-German Heinz-Harald Frentzen.Here to attend the unveiling of drivers for the inaugural i1Super Series, the 44-year-old Frentzen who was once considered to be quicker than Schumacher, said: “As you grow older, you tend to hesitate and become indecisive whether or not to push and take risks. You lose precious tenths of a second. I think, Michael is at that stage in his career.”Schumacher, who retired in 2007 but returned to Formula One with Mercedes GP team, finished the 2010 season in ninth position with 72 points, but without a win or a podium finish, and this year, he was eighth with 76 points.Speaking on the sidelines of the function, Frentzen, who along with Schumacher was hailed as the best racing talent emerging from Germany, had only three wins and 18 podium finishes from 156 starts for a record that never quite reflected his talent.“I think, I took the wrong decisions while Michael (Schumacher) took the right ones,” said Frentzen whose rivalry with Schumacher dates back to the Mercedes Junior programme. He opted out of it in favour of Jordan team in F3000 series.