Ole Gunnar Solskjaer has opened up on the warning sign that was raised with him ahead of Manchester United signing one player under his reign at Old Trafford. The 51-year-old former Manchester United manager was sacked by the Premier League club in the 2021-22 campaign after a disappointing start to the season. United were thrashed 4-1 by Watford at Vicarage Road in November 2021 and Ole Gunnar Solskjaer was axed while the club were seventh in the league table. Solskjaer initially returned to Old Trafford in 2018 as caretaker manager after Jose Mourinho was sacked during the 2018-19 Premier Le…