Iconic former Manchester United manager Sir Alex Ferguson has appeared to drop a rare compliment on one Liverpool star, despite not naming him specifically. Sir Alex Ferguson bowed out of management in 2013 after he led Manchester United to their last Premier League title at the end of the 2012-13 campaign. Considered one of the best managers of all time, Ferguson famously bragged about his achievement of knocking Liverpool off their perch in English football. The 82-year-old legendary Scotsman lifted an incredible 13 Premier League titles, with United winning the most domestic league trophies…