Phiri’s Guingamp are still in that competition as well and host struggling Monaco.
Tau had two goals controversially ruled out as he started for Royal Union St Gilloise as they earned 0-0 draw away at more fancied Mechelen in the first leg of their Belgian Cup semifinal.
Tau twice had the ball in the back of the net but was flagged for offside‚ with replays showing the calls were marginal at best.
What was more galling for Union fans is the fact that the Video Assistant Referee was available to be used by the match officials‚ but was not used.
Union have now played to two draws and two defeats to fellow second-tier side Mechelen this season‚ but in all games have felt on the wrong side of the match officials.