While England boast a formidable attacking threat, there are concerns about their defence which is perhaps why Southgate is prepared to look at new candidates before he has to make his final call for the tournament.
Images from the Europa League semi-finals second leg between Manchester United and Athletic Bilbao, Tottenham Hotspur and Bodo/Glimt, on Thursday.
Harry Kane and his England lions were ecstatic, and as Neil Diamond's classic 'Sweet Caroline' played on the loudspeaker, they crooned along in celebration.
England hammered Iran 6-2 on Monday in an emphatic World Cup opener thanks to two goals from Bukayo Saka
Images from the Europa League semi-finals first Leg between Athletic Bilbao and Manchester United, Tottenham Hotspur and Bodo/Glimt.
The patched-up backline will come up against an erratic Serbia with an experienced attack led by Aleksandar Mitrovic, who notched 28 goals in 28 matches in the Saudi Pro League and is a major threat in the air.
Images from Saturday's action in the Premier League.
Joshua Zirkzee scored the winning penalty for 10-man Manchester United against Arsenal after their hectic FA Cup third round tie finished 1-1 after extra time.
Harry Kane scored twice as England stormed into the European Championship semi-finals for the first time in 25 years thrashing Ukraine 4-0 on Saturday to book a clash with Denmark.
England coach Gareth Southgate acknowledged his side had failed to repeat their early World Cup attacking fluency in their 0-0 draw with the United States, but said success in major tournaments often required such gritty performances.
England and Denmark were 1-1 at half-time in the second Euro 2020 semi-final at Wembley on Wednesday.
Images from the Premier League match between Manchester United and Fulham, at Old Trafford, on Friday
Striker Harry Kane netted a brace and Maguire and Jordan Henderson both headed home from set pieces to deliver England to their second straight semi-final at a major tournament after they reached the last four of the 2018 World Cup in Russia.
IMAGES from Premier League matches played on Sunday.
"It feels like a missed chance because I felt the performances were really good and the focus and the hunger was good every single day," said England midfielder Jordan Henderson.
Bellingham, who became the first European player to make an appearance at three major international tournaments before turning 21, looked nothing like a 20-year-old.
Italy qualified for Euro 2024 after drawing 0-0 against Ukraine in their final Group C qualifier on Monday.
United fizzled out in the second half and Norwich looked more likely to break the deadlock as David De Gea kept out a Teemu Pukki shot from the edge of the area before Ronaldo struck, sending Krul the wrong way.
England created numerous chances but Calvert-Lewin's penalty was the only addition to the score as the hosts impressed ahead of Nations League clashes against Belgium and Iceland.
The defenders signed contracts on Tuesday from Bayern Munich making United their third team together, and they could both feature in the squad's season opener on Friday against Fulham at Old Trafford.
Second-half goals from substitutes Fred and Anthony Elanga earned Manchester United a 4-2 victory over Leeds United in a thriller at Elland Road in the Premier League on Sunday.
Manchester United languish 14th in the standings on 19 points, their worst placing to end a calendar year since they were 15th in 1989.
Headed goals from Anthony Martial and captain Harry Maguire earned Manchester United a hard-fought 2-0 win at toothless Chelsea on Monday amid more VAR controversy, putting them back in the hunt for a top-four Premier League finish. The VAR system made the headlines once again after two Chelsea efforts were ruled out and England international Maguire escaped sanction for a kick out at Michy Batshuayi.
Man United out of Europe after 1-0 home loss to Bayern Munich
An impressive England advanced to their first World Cup semi-final for 28 years on Saturday after headers by Harry Maguire and Dele Alli gave them a deserved 2-0 last-eight victory over a disappointing Sweden.
Manchester United conceded two late own goals to allow Sevilla to snatch a 2-2 draw in the first leg of their Europa League quarter-final at Old Trafford on Thursday.
England players find solace in WAGs and kids
Images from the UEFA Champions League matches played on Tuesday.
While the England players grab the headlines for their on-field showing, at the ongoing FIFA World Cup in Russia, their WAGS also enjoyed a spot in the limelight.
Erik ten Hag's side will face Championship (second-tier) outfit Coventry City in the semis after they upset Wolverhampton Wanderers 3-2 on Saturday.
Man United get injury boost ahead of Liverpool FA Cup clash
;You will have setbacks. We beat Arsenal, we beat Liverpool. On Sunday, we had a bad day at the office. City were better, we have to accept that. But we can't accept our unacceptable performance. So thank you for the lesson, Pep and City. We have to understand, we have to do things much better.'
English hopes of a run deep into the World Cup took a bit of a bruising on Friday when a lively and high-pressing United States team reduced the youthful stars of their tournament opener to anonymity.
BBC pundit Chris Sutton said United had "hit rock bottom" while his former strike partner Alan Shearer put down the debacle to years of mismanagement at Old Trafford.
Defender Luke Shaw, who made a series of defensive errors alongside captain Harry Maguire on Sunday, echoed Ronaldo's comments.
IMAGES from the Premier League matches played across England, on Sunday.
An own goal by Stoke City keeper Jack Butland gifted Leicester City an equaliser in a 1-1 Premier League draw at the King Power Stadium on Saturday and denied Paul Lambert's side a rare win on the road.
Manchester United manager Erik ten Hag backed Bruno Fernandes to continue his role as stand-in skipper.
Iran are second on three points with Wales bottom on one point and all outcomes are still possible going into the final round of games when England take on the Welsh.
List of major transfers in the top Premier League ahead of the 2019-20 season (all transfer fees as reported by British media):