The sense of burning injustice can not be allowed to fester for too long ; for all the psychobabble spouted about the strength of a siege mentality , there are few things more self-destructive than a suspicion that even the greatest effort may be undone by outside forces . The good news for Celtic is that they have an immediate opportunity to both vent their frustration and exorcise any sense of helplessness created by Sunday ’ s controversial Scottish Cup semi-final loss . The bad news ? Ronny Deila ’ s men looked like a tired team by time-up at Hampden . As hard as they may have worked at building exactly the stamina needed for this stage of the season , having to play for some 70 minutes – including extra time – with 10 men inevitably left them appearing more than a little leggy . Celtic left back Emilo Izaguirre has called on his team-mates to focus their attention on winning the league title . Izaguirre and Celtic team-mates John Guidetti , Nir Bitton and Scott Brown look dejected during semi-final loss . Celtic are currently five points ahead of Aberdeen . As they travel to Dens Park to take on an always-dangerous Dundee , Deila , John Collins and the rest of his backroom team must find a way to lift – emotionally as much as physically – players who have seen a rare and historic Treble wrested from their grasp . Emilio Izaguirre , still low but trying to raise his eyes to the remaining challenge of finishing off with a domestic Double , said : ‘ Now the Treble is finished . ‘ We ’ ll try our best to win the league now - and next season we ’ ll try to win the Treble . Now it ’ s finished , everything is finished - and we must try our best to win the league . ‘ It is hard to speak about the game after Inverness have won . It ’ s in the past and we must now work up the mentality now to win the league . ‘ It is difficult with 10 men in a semi-final . Inverness are hungry and maybe more emotional . They controlled the ball and it was hard for us against 11 men . ‘ To not have a Scottish Cup final to look forward to is so hard . We want to win the Treble but now it ’ s over . It ’ s all about winning the league now . ‘ I don ’ t like to speak about the referee . It happens in football sometimes when bad decisions and good decisions change the game but it ’ s finished . Inverness won 3-2 and we ’ ll look to Wednesday . It ’ s important we move on and work on winning our next game. ’ In the aftermath of such a sickening loss , Celtic have no option but to move on and concentrate on beating Dundee , re-establishing their commanding eight-point lead over nominal challengers Aberdeen . What neither Deila nor his players can afford to do , though , is completely ignore some of the lessons learned in defeat by Caley Thistle . Ignoring the obvious pointer about hoping a team umpteen officials can spot a deliberate handball on the line . The way in which Celtic were exposed by Inverness in the game ’ s *other* crucial moment , Marley Watkins out-pacing and out-muscling Adam Matthews before beating Craig Gordon to the ball , must be of concern . Celtic striker Leigh Griffiths has a goal-bound shot blocked by the outstretched arm of Josh Meekings . Virgil van Dijk , scorer of a wonderful opener on Sunday , admitted : ‘ We will look at our own performance , because we lost . ‘ It ( the Josh Meekings handball ) should be the key moment but the penalty wasn ’ t given so it ’ s nothing to talk about right now . We lost and we ’ re very disappointed . ‘ We gave everything . With 10 men we kept on fighting , we had enough quality to create a goal but unfortunately it wasn ’ t enough . ‘ It ’ s very disappointing of course but we need to move on . On Wednesday we play Dundee away . There is a lot of disappointment . Everybody is down but we are professionals and we need to focus on Dundee . ‘ That ’ s a big game so we need to be ready for that . But first we need to recover. ’ Celtic's Virgil van Dijk has also urged his team-mates to move on from their recent defeat by Inverness .
Emilo Izaguirre has rallied his team-mates ahead of final six league games . Celtic 's hopes of winning domestic Treble came to an end on Sunday . The former Real Madrid and Barcelona striker scored twice in the first half as Celtic won 3-1 at home against Motherwell with goals from Leigh Griffiths, Scott Brown and Conor McAleny.