Manchester United boss Jose Mourinho was branded 'the master of mind games' by Ajax's official website last week - although the Dutch club seem to have a few tricks of their own ahead of the Europa League final.
The Red Devils face Ajax in the showpiece event on Wednesday and the two clubs have wasted no time in attempting to psyche each other out ahead of the match.
United are yet to win the Europa League - the only piece of major silverware missing from their trophy cabinet - and Ajax's official Twitter account was all too happy to remind them of the fact on Monday morning.