Glasgow’s Callum Gibbins warns Saracens may suffer Twickenham hangover

Co-captain says European Champions Cup quarter-final next Saturday could resound to impact of Scotland’s stunning Six Nations fightback against EnglandGlasgow have not beaten Saracens in five attempts in the European Cup, but after last week’s astonishing comeback by Scotland in the Calcutta Cup match at Twickenham, they aim to make lightning counterattacking strike for a second time next Saturday, against the English champions.Scotland came from 31-0 down against England to lead 38-31 before having to settle for a draw after conceding a try in the final minute. Glasgow have conceded 38 points…