Kyle Walker conceded he is still learning on the job as England's right-sided centre-back at the World Cup after coming in for criticism from Rio Ferdinand.
An attacking full-back by trade, Walker has largely impressed since switching to the position for the Three Lions' March friendlies against Netherlands and Italy.
But he gave away a penalty for Tunisia's equaliser in England's eventual 2-1 Group G win in Volgograd, with Ferdinand describing Walker's body positioning as "criminal".
"It's a new position for me, of course I'm still learning," the Manchester City defender told reporters.
"I've got great people next to me and the gaffer [Gareth Southgate] as well, who's watching coaching me and making sure I know certain tips in key areas when I'm playing in that position.
"He's entitled to his opinion. He wasn't playing the game, so that's it.
"It's not that I've never felt uncomfortable about it. As I've said before, it's new tools to my toolbox that I feel will improve my game.
"I don't get forward as much, which is a big part of my game. But I can use my pace in different areas to cover people.
"As long as I'm on the pitch and England are doing well, I'm completely fine with it."
Group G outsiders Panama are up next for England on the back of their 3-0 defeat to Belgium.
Walker believes lessons learned from their Euro 2016 humiliation against Iceland means any slip-ups should be avoided.
"I think we’ve learned a lot. The team has evolved massively from the Iceland game," he said.
"We proved that against Tunisia. The board went up [for injury time] and I didn't even realise. We just kept to our game plan. We didn't panic and we got the goal at the end of it.
"I think that shows the character that's in the team and the belief that we have in each other. Hopefully the same thing doesn't reoccur."
|Ovechkin, Kim earn major honours at ESPY Awards|
|Owens not ´actively seeking´ to play in NFL again|
|Argentina need Messi – Tevez urges Lionel not to retire|
|Minnesota United 2 New England Revolution 1: Ramirez, Quintero sink stuttering visitors|
|Shaw: I want to be first name on Man United teamsheet|
|Manny Machado dealt to Dodgers|
|Pjanic hails Ronaldo arrival but refuses to confirm Juve future|
|Perotti: Roma can cope without Liverpool-bound Alisson|
|Klopp hopes Liverpool building towards title tilt|
|Karlovic exits as four seeds bow out in Newport|
|Angels clap back at Manfred´s marketing comments on Trout|
|Titans DL Casey will still protest despite new anthem policy|
|Popovich on Leonard trade: It´s time to move on|
|Zola returns to Chelsea as Sarri´s assistant|
|Anthony Joshua targets ´dream´ fight in Texas|
|Celtic 3 Alashkert 0 (6-0 agg): Dembele hits brace before injury worry|
|Schwartzman stumbles but Spanish duo reach last eight at Swedish Open|
|Top seeds progress in Bucharest as Larsson conquers Kung|
|Perez promises ´incredible´ signings at Real Madrid|
|Liverpool need a top goalkeeper - Souness|
|It was just an absolute car crash - Root regrets bat-drop celebration|
|Mourinho´s pre-season fears mount with Sanchez sidelined|
|Alisson thanks Roma fans ahead of rumoured Liverpool switch|
|Pogba must understand his World Cup heroics, says Mourinho|
|Odriozola excited by Lopetegui reunion at Real Madrid|
|Revis announces retirement from NFL after 11 seasons|
|The Open 2018 diary: Rahm´s saving Grace, Rory´s going grey|
|Kawhi Leonard traded to Raptors as DeMar DeRozan heads to Spurs|
|Cantona, Rosberg and other surprise retirements after Warburton hangs up his boots|
|No doubting Thomas as he climbs into yellow with stage win|
|Liverpool´s Oxlade-Chamberlain to miss ´vast majority´ of 2018-19|
|Open Championship by far the greatest - Player|
|Sarri wants new central midfielder and hints at Chelsea stay for Cahill|
|Nantes sign former Manchester United full-back Fabio|
|Marcelino rewarded with one-year Valencia extension|
|Warburton retires: Bale leads social media tributes to Welsh great|
|Mistakes do not define me, says Chelsea boss Sarri|
|Saints and Tigers to honour Horne with Twickenham clash|
|I want to keep Hazard, says Sarri|
|Europe must stop American juggernaut at Carnoustie|
|Joshua planning for heavyweight ´legacy´ – starting with Povetkin|
|Warburton retires: Wales and Lions star´s career in numbers|
|Matching ´ridiculous´ Tiger not on McIlroy´s radar|
|Spain sent me World Cup SOS, claims Benitez|
|Ozil, Gundogan critics should ´shut up´ - Klopp|
|McIlroy plans to play carefree at Carnoustie|
|Pakistan thrash Zimbabwe to secure series win|
|Warburton retires: Gatland salutes Wales and Lions great|
|Sturridge determined to stay at Liverpool|
|Mbappe is an alien – Varane|
|Warburton retires from rugby|
|India to assess Bhuvneshwar as Bumrah makes Test squad|
|Injured Craddock passes $100,000 in donations at Tour de France|
|WATCH: Perez taunts team-mate after audacious training goal|
|Alison Becker tweets ´I´m joining Liverpool´... but all is not as it seems|
|F1 Raceweek: Hamilton chasing down Schumacher - German GP in numbers|
|Notorious Carnoustie holds fond memories for legendary Watson|
|Rooney refused to be ´dead weight´ at Everton|
|The Open 2018: Molinari, Rahm and the in-form contenders at Carnoustie|
|Marsh interested in Australia leadership roles|
|United can challenge City for Premier League title, says Rooney|
|MLB All-Star 2018: Seven things you missed at Midsummer Classic|
|American League win home run-filled MLB All-Star game|
|Dragons lure Sims from Broncos|
|Cassano: Ronaldo like Nadal, Messi like Federer|
|Lakers´ Ball undergoes successful knee surgery|
|´We kill them, Messi or no Messi´ - Pogba´s pre-Argentina World Cup speech revealed|
|Cardinals suspend GM Keim for five weeks after DUI|
|Dalic: I can coach Brazil or Barca but Croatia my favourite|
|Warriors coach Kerr extends contract|