<!-- Article Start --> <h3 style="text-align: justify">As Manchester United prepare to return to Champions League after an absence of a year, Louis van Gaal has challenged his players to prove themselves at the highest level.</h3> <h3 style="text-align: justify"></h3> <p style="text-align: justify">Having spent over 250m GBP over the last two summer transfer windows, Manchester United have returned to the Champions League after a season-long hiatus.</p> <p style="text-align: justify">Louis van Gaal has won the competition once with Ajax back in 95-96 and also took Bayern Munich to the final in 2009-10, only to lose out to Jose Mourinho's Inter Milan.</p> <h3 style="text-align: justify">Manchester United players need to prove themselves</h3> <p style="text-align: justify">Ahead of his side's Group B meeting against the Dutch champions PSV Eindhoven, the United manager has urged his men to prove their worth in Europe's top competition. The English giants have been handed a fairly tough group, but nothing suggests they cannot top it if they were to perform to their potential.</p> . <p style="text-align: justify">"We have to show on the pitch if we are able to win matches on the highest level," the United manager was quoted as saying by <a href="http://www.espnfc.com/uefa-champions-league/match/434270/psv-eindhoven-manchester-united/preview">ESPN FC</a>.</p> <p style="text-align: justify">"That's also a challenge for us now. Last year we were fourth in the Premier League.</p> <p style="text-align: justify">"We qualified ourselves this year and that was our aim so now we have to show if we are able to play at that level and that I don't know, neither. I have to wait and see.</p> <p style="text-align: justify">"I think the Champions League is a higher podium than the Premier League but maybe it's not like that."</p> <p style="text-align: justify">Manchester United fans will hope that the players respond to the challenge thrown at them by the manager and prove their worth in Europe's elite club competition.</p> <!-- Article End -->