Former Manchester United star Brian McClair has urged Jose Mourinho to start smiling on the touchline.Mourinho has cut a frustrated figure during the club’s pre-season tour of the United States, repeatedly appearing miserable both on the bench and in press conferences.The Portuguese has called on the club to buy new players, and has also questioned the ability of the side’s youth team, having utilised a number of youngsters in America. Article continues below Editors’ Picks Man Utd ready to spend big on Sancho and Haaland in January Who is Marcus Thuram? Lilian’s son who is top of the Bundesliga with Borussia Monchengladbach Brazil, beware! Messi and Argentina out for revenge after Copa controversy Best player in MLS? Zlatan wasn’t even the best player in LA! McClair, though, believes that Mourinho should try to cheer up.”There has to be a balance,” McClair told BBC World Service Sport.”You should, at some point, look as though you are enjoying it.”McClair made over 350 appearances for United between 1987 and 1998, winning four Premier League titles, two FA Cups and the European Cup Winners’ Cup.Having played under Sir Alex Ferguson, he believes that there are similarities between Mourinho and the Scot, but believes that their current manager’s surly nature must “grate” on fans.”It is fine to be critical, upset and unhappy – Sir Alex had those moments too, but there were several times where he looked very happy.”Jose maybe enjoys himself internally but from a football point of view, the Manchester United fans would very much welcome to see him smiling and laughing at appropriate times.”From an opposite view, your great rivals have been Liverpool and they have a coach (Jurgen Klopp) who does laugh and smile and look pleased to be there. That must grate as well at times if you are a United fan.” Check out Goal’s Premier League 2019-20 fantasy football podcast for game tips, debate and rivalries.