Tottenham Hotspur delivered arguably the worst display of their season in Saturday’s early Premier League kick-off at Newcastle United. Spurs went into the game hoping to tighten their grip on fourth place following their solid win over Nottingham Forest last time out. Instead, Tottenham lost so badly that they slipped out of the top four on goal difference without Aston Villa kicking a ball. Spurs conceded their first in the 30th minute as Alexander Isak latched on to Anthony Gordon’s pass, cut inside and fired past Guglielmo Vicario into the low corner of the net. Newcastle made it two just …