Barcelona attacking midfielder Philippe Coutinho is set to join Bayern Munich on a season-long loan.The Brazil international, 27, was left out of Barcelona's squad for their La Liga opener against Athletic Bilbao on Friday."We can confirm that there is an agreement in principle for the loan of Coutinho to Bayern," said Barcelona club director Guillermo Amor before the match."We just have to finalise the deal."Bayern sporting director Hasan Salihamidzic confirmed the two clubs and Coutinho had reached an agreement as he spoke after the Bundesliga champions' 2-2 draw with Hertha Berlin on Friday."Only a few details are still to be sorted out," he said. "We are very happy that we will bring this player to Bayern."Coutinho, who was in the crowd for Barcelona's La Liga opener, joined the club from Liverpool in a £142m deal in January 2018.Despite scoring 21 goals in 76 appearances for the Spanish giants, he has fallen short of expectations and been linked with several clubs this summer.It is believed he was included as part of a bid by Barcelona to re-sign Neymar from Paris St-Germain, the Spanish club reportedly willing to offer 100m euros (£92.4m) plus Coutinho for the forward.Tottenham ended their interest in a loan deal for Coutinho earlier this month, while he was also linked with moves to Arsenal and back to Liverpool.