England captain Harry Kane accused match referee Danny Makkelie of buckling under pressure when he ruled out a Danny Welbeck goal for an infringement as England lost 2-1 to Spain in the Nations League.
Gareth Southgate fears Harry Kane could be in danger of burnout after revealing his concerns over England's lack of attacking options.
To mark the occasion, the Spurs striker wore a special pair of gold boots for the clash with the 2010 world champions.
There was some relief for England, though, as left-back Luke Shaw confirmed he is fine after being stretchered off early in the second half with a nasty head injury.
Switzerland will not be an easy task, however, coming into the match on the back of a resounding 6-0 thrashing they handed out to Iceland - an old, haunting enemy of England's past footballing endeavours.
Southgate's contract expires at the end of Euro 2020, with the England boss still having two years remaining on his current deal.
The Tottenham striker scored six goals at the World Cup in Russian Federation last summer as England reached the semi-finals, but Kane flagged as the tournament wore on and has now not netted in his last four internationals.More news: Nike's Colin Kaepernick campaign sends 'terrible message'
The Manchester United left-back was making his first worldwide start in three years after battling back from a broken leg and loss of form in the past two seasons.
Southgate says the next three months will be an exceptional challenge and will tell us exactly where we stand. "But I don't think we were under any illusions as a coaching team".
"Winning like this on this stage will do us a lot of good and we've started in the best way possible but in football the only thing that matters is the present".
"We need to asses over the weekend, but I think it's likely we'll need to call some players in", Southgate said.
"Your errors sometimes help you, as you try to improve and grow up and all in all I am really happy with David, he is a top player". At the moment we have a different profile of player, we can't play the way that they want to play.
"Xavi and Iniesta are the history of our national team, they made us the best in the world", said Saul.
"He can collect the ball close to the defenders and give it to Philippe Coutinho or Neymar".