Newcastle suffered a 3-0 defeat to Watford at St. James’ Park in the Premier League on Saturday afternoon.
Will Hughes put the Hornets in the lead after just 19 minutes, and DeAndre Yedlin scored an own goal in first-half injury time.
Andre Gray wrapped up the scoring for the visiting team in the 62nd minute.
The performance of Newcastle against Watford at St. James’ Park on Saturday afternoon was one of their worst of the season so far.
Newcastle legend Shearer was following the match, and he has reacted strongly on Twitter to the defeat for Rafael Benitez’s side.
Over the course of the 90 minutes at St. James’ Park on Saturday afternoon, hosts Newcastle had 52% of the possession, took 12 shots of which two were on target, and earned six corners, according to BBC Sport.