United eased the pressure on manager David Moyes following a comfortable 3-0 win over relegation-threatened West Brom on Saturday.
United's time will come again, Moyes ensured fans after writing to season-ticket holders to thank them for their support during a "difficult" season.
Vidic joined United in 2006, winning a host of trophies, including five Premier League titles, the Champions League and the Club World Cup.
Ferguson says he owes his success to being beaten with a belt by his favourite school-teacher when he stepped out of line as a schoolboy.
"Manchester United's disastrous season was lying in ruins last night after they were humiliated in Athens" said The Sun.
For Olympiakos the victory was celebrated as a history-making breakthrough against the Premier League giants after four previous failures.
Defeat at the Georgios Karaiskakis Stadium represented yet another body blow in an inauspicious campaign for last season's English Premier League title winners.
United were exposed as mediocre on the European stage with manager David Moyes shocked at the evidence on display in a disappointing 2-0 defeat at Olympiakos.
United slumped to a 2-0 defeat to Olympiakos in the last 16 of the Champions League after Dominguez and Campbell scored in each half of the first leg match.
The Greek champions have reached the last-16 for the first time and have lost their four previous meetings with United.
Rooney has signed a four-year contract extension with EPL champions United that will keep their prize asset at the club until June 2019.