England have come in for criticism after their frustrating 0-0 draw with Slovakia last week, but Bertrand says the best is yet to come.
Ryan Bertrand believes England will soon show their best form
The Three Lions were held to a frustrating 0-0 draw to Slovakia in their last group game in St Etienne, sparking questions over their ability to break down weaker teams.
England head coach Roy Hodgson was left frustrated by his side's 0-0 draw with Slovakia
Their inability to see off a poor Russia side in their opening game of the tournament has only given Hodgson's critics further ammunition, but Southampton full-back Bertrand is certain England will soon hit top gear.
He was also quick to dismiss any suggestions that England were lagging behind the tournament's other highly fancied teams.
According to The Mirror, he said: “No one has really been full throttle and I would definitely put England in there with the teams that have tried to win their games.
England head coach Roy Hodgson will be hoping his side can book their place in the quarter-finals
“It’s only been because we have come up against resilient opponents that we haven’t been able to capitalise and get the results.”
Bertrand has so far only made one appearance for England in France, but he has nevertheless been impressed by his team's defensive performances, with Hodgson's men conceding just two goals in three games.
He added: “Seriously, I think we have had only three or four shots on target against us in three games, so, defensively, we have been really compact and a good unit.
England face Iceland for a place in the quarter-finals of Euro 2016
“We kept a clean sheet against Slovakia, but it’s never nice to just sit on the draw – we wanted maximum points.”
England will face one of the tournament's surprise packages in Iceland on Monday, with the winner facing France in the quarter-finals.