Page last updated at 12:37 GMT, Saturday, 21 February 2009
Premier League v Serie A: Ferguson v Mourinho
The top managers in their respective divisions are set to face each other in the Champions League.
The old adversaries have an unwavering faith in their own ability that, some would say, borders on arrogance.
But looking at their respective records, they would be fully justified in being so.
Who is better? On achievements alone it is 67-year-old Sir Alex Ferguson, having led his Manchester United side to 10 league titles, two European Cups, five FA Cups, two league cups, one Cup Winners' Cup and the Fifa Club World Cup. He also helped Aberdeen to Cup Winners' Cup glory in 1983.
Inter Milan boss Jose Mourinho, 46, is the new kid on the block having began his managerial career in 2000.
In that time, he has won the Champions League and Uefa Cup with Porto and two Premier League titles, one FA Cup and two league cups with Chelsea between 2004 to 2007.
Mourinho is on a run of 110 home league matches unbeaten and the last time a side he managed lost a league match at home was when Porto were beaten 3-2 by Beira-Mar on 23 February 2002.
The chart on the left shows that Mourinho had a slightly better win to games ratio than Ferguson during his three seasons in the Premier League.