The games are coming thick and fast in the UEFA Nations League as Wales take on Bulgaria in an intriguing League B game that could determine the fortunes of both sides for the rest of the tournament. Ireland and Finland have also made their presence felt in Group 4 and both Wales and Bulgaria will have to be at their best in this fixture.Wales are currently in excellent form and won their opening game of the UEFA Nations League 2020-21 campaign after pipping Finland by a narrow 1-0 margin. With Gareth Bale and Daniel James making up their front-line, Wales have one of the fastest attacks in the tournament.Bulgaria, on the other hand, drew their first game of the tournament and played out a 1-1 stalemate against Ireland earlier this week. The Bulgarians are the underdogs of the group and a victory tomorrow would do wonders for Krasimir Balkov's side.Good news Wales fans! 🙌Fit-again winger David Brooks has boosted Wales ahead of hosting Bulgaria in Sunday's Nations League encounter in Cardiff.➡️ https://t.co/ArTXt3oyxK pic.twitter.com/qwU4NzVfdu— BBC Sport Wales (@BBCSportWales) September 4, 2020Wales vs Bulgaria Head-to-HeadBulgaria and Wales have played over four games against each other since the turn of the century and Wales predictably have a superior head-to-head record. Wales have managed two victories in this fixture as opposed to Bulgaria's solitary win.The previous meeting between these two sides came in 2011 with Wales managing a 1-0 victory against a strong Bulgaria side. A 22-year-old Gareth Bale scored the only goal of the game and the Real Madrid speedster will want to get on to the scoresheet yet again on Sunday.Wales form guide: W-W-W-D-DBulgaria form guide: W-W-W-D-DAlso Read: Serie A 2019/20: Team of the seasonWales vs Bulgaria Team NewsAaron Ramsey is not available for this gameWalesWales will have to do without several key players against Bulgaria over the weekend. The likes of Aaron Ramsey, Tyler Roberts, and Ashley Williams have not joined the squad. David Brooks has been declared fit by the Welsh medical team and offers Ryan Giggs and alternative option on the flanks.Injured: Aaron Ramsey, Tyler Roberts, Ashley WilliamsDoubtful: NoneSuspended: NoneBulgaria are a strong team. Image Source: NewsBeezerBulgaria have a fully fit squad and are unlikely to make any drastic changes from the team that nearly defeated Ireland earlier this week. The Bulgarians have a well-drilled defence and will have to be resolute against a strong Wales side.Injured: NoneDoubtful: NoneSuspended: NoneWales vs Bulgaria Predicted XIWales Predicted XI (4-2-3-1): Wayne Hennessey; Ben Davies, Chris Mepham, Tom Lockyer, Neco Williams; Joe Morrell, Joe Allen; Daniel James, Harry Wilson, Gareth Bale; Kieffer MooreWales welcome Bulgaria to the Cardiff City Stadium in the Nations League tournament, this Sunday.#WALBUL 🏴󠁧󠁢󠁷󠁬󠁳󠁿 v 🇧🇬📻 Radio Live commentary on @BBCRadioWales and @BBCRadioCymru📺 Television Highlights on MOTD Wales, 10.30pm @BBCOne WalesWales pic.twitter.com/fZgWcdhZLZ— BBC Wales 🏴󠁧󠁢󠁷󠁬󠁳󠁿 (@BBCWales) September 4, 2020Bulgaria Predicted XI (4-2-3-1): Nikolay Mihaylov; Anton Nedyalkov, Petar Zanev, Kristian Dimitrov, Strahil Popov; Kristiyan Malinov, Georgi Kostadinov; Galin Ivanov, Todor Nedelev, Spas Delev; Bozhidar KraevWales vs Bulgaria PredictionWales are the favourites going into this fixture and can win establish a significant lead in Group 4 with a victory against Bulgaria this weekend. The likes of Kieffer Moore, Gareth Bale, and Daniel James can form a potent attacking combination and Bulgaria will have to work hard to neutralise Wales' threat on the counter.Bulgaria put in an excellent shift against Ireland in their first group game and can be a difficult team to break down. Wales and Ryan Giggs have a lethal attacking force at their disposal, however, and should be able to win this fixture.Prediction: Wales 2-0 BulgariaAlso Read: 10 Greatest Football Managers of all time