LONDON, June 1 — Gareth Southgate will begin the process of fine-tuning his World Cup starting line-up when England host Nigeria in tomorrow's friendly at Wembley. Southgate has just link w88 two more opportunities to see his team in action before they jet off to Russia for the World Cup. Tomorrow's clash with Nigeria is followed by a second friendly against Costa Rica at Elland Road next Thursday. Both of England's opponents have qualified for the World Cup and their differing styles will offer Southgate a glimpse at how his players will cope with the varied approaches they will face in Russia. But the England manager's main goal will be to experiment with his line-up to learn as much as possible about the players he expects to feature in their first w88 promotion group match against Tunisia in Volgograd on June 18. Top of his to-do list will be resolving which of his inexperienced goalkeepers is his first choice. Stoke's Jack Butland, Everton's Jordan Pickford and Burnley's Nick Pope have only nine caps between them. Pope had a brilliant season for Burnley and kept more clean sheets than any other English keeper. But he has yet to feature for England, making Butland — who has seven caps — the slight favourite at this stage. Southgate is expected to play a m88bet three-man defence, having used the system in recent matches. Kyle Walker is set to start on the right of the back three, with his Manchester City team-mate John Stones in the middle. That leaves Chelsea captain Gary Cahill and Leicester's Harry Maguire likely to fight for the other spot. If Maguire starts it would complete a remarkable rise for a 25-year-old who travelled with his brothers to watch England as a fan at Euro 2016. “It was a great occasion for myself to go over there and see them play live and the atmosphere,” Maguire said. “The fans out there — the incredible atmosphere, the passion that m88 live they show. “It is something if you look back and you think you'd be there, you'd probably think you were dreaming. “But it's a dream come true for myself to represent England, so it's a really proud moment.” If Southgate plays Walker in central defence, he still has plenty of options at wingback. Kieran Trippier and Trent Alexander-Arnold are the contenders on the right and Danny Rose and Ashley Young on the left.