"I think it was Ronald De Boer after he left Barcelona." Not the case - both Ronald and Frank played for Rangers, not Celtic. No Dutch players have played for both - Rangers were linked with ex-Celt Pierre Van Hooijdonk when Dick Advocaat was in charge, Celtic were linked with Giovanni Van Bronckhorst before he left Arsenal. Neither came about.
Played For Arsenal and BarcelonaPetit OvermarsHenryGio Van bronkhorstHleb
Celtic Celtic have 109 trophies to Arsenals 45
Van Bronckhorst, Larsson and ...
In the emirates cup on the 1st of august. It finished 3-2 to arsenal.
One such player is Nicholas Anelka.
one million players