Marseille are expecting their record crowd at Stade Velodrome for a European fixture when they take on Albion.
A few hundred tickets remained today for the Europa League Group B clash.
The final attendance figure is likely to beat the 62,500 who saw a Champions League game versus Eintracht Frankfurt last season.
The stadium has been enlarged since heady days of the late 1980s and early 1990s, such as a Chris Waddle-inspired win over Milan.
A local source said curiosity over the arrival of Gennaro Gattuso was the reason for such interest.
OM have not played at home since September 17 and have had only one game here since August 26.
Albion will be backed by approaching 3,000 fans.
Temperatures and humidity have dropped a little this afternoon and there is some cloud cover.
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