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A spot in the Copa del Rey final against Valencia will be at stake when Real Betis hosts Rayo Vallecano in the second leg of a Copa del Rey semifinal on Thursday at Estadio Benito Villamarin in Sevilla. Real Betis enters Thursday's match leading 2-1 in aggregate after the first leg in Madrid on Feb. 9. The team that advances to the final, which will be played April 23 in Seville, will meet Valencia, which advanced 2-1 in aggregate over Athletic Bilbao in the other semifinal. 

Kickoff between Real Betis and Rayo Vallecano is set for 3 p.m. ET. Real Betis is listed as a -150 favorite (risk $150 to win $100) in the latest Real Betis vs. Rayo Vallecano odds, while Rayo is a +360 underdog. A draw is +270, and the over-under for total goals is 2.5. Before making any Rayo Vallecano vs. Real Betis picks or Copa del Rey predictions, you need to see what renowned soccer bettor Jon Eimer has to say.

Eimer is a high-volume bettor who has vast knowledge of leagues and players across the globe. Since joining SportsLine, Eimer has covered the English Premier League, Serie A, the FA Cup and much more. The Indiana-based handicapper compiled a winning record of 260-133-1 with more than 90 units of profit for his community on various platforms over a recent two-month stretch.

Now, Eimer has taken a close look at Real Betis vs. Rayo Vallecano and locked in a confident pick. He has identified several factors as to why this wager will cash. You can visit SportsLine now to see his Copa del Rey pick. 

Why you should back Real Betis 

Real Betis is one of the most prolific scoring teams in LaLiga. Manuel Pellegrini's men have scored 48 goals in La Liga this season, which ranks second behind only Real Madrid (52). Juanmi leads the team with 12 goals, while Borja Iglesias has added seven.

In addition, Real Betis faces a Rayo Vallecano side that has struggled mightily recently. Rayo has lost its last five matches -- four La Liga matches and the 2-1 loss to Real Betis in the first leg of the Copa semifinal. Rayo was outscored 10-2 over that span and did not find the net in three of those games.

Why you should back Rayo Vallecano

Andoni Iraola's side has one of the best playmakers in La Liga in Oscar Trejo. The 33-year-old forward from Argentina has nine assists in 23 matches this season. He is tied with Real Madrid's Karim Benzema for the most assists in La Liga.

In addition, Rayo is coming off a strong performance in its last match, against La Liga's top team, Real Madrid. On Saturday, Rayo arguably outplayed Real Madrid for 82 minutes until a Benzema goal gave Real Madrid the winning margin. Rayo outshot Real Madrid 19-13 and were only kept scoreless because of two tremendous second half saves by goalkeeper Thibaut Courtois.

How to make Rayo Vallecano vs. Real Betis picks

Eimer has analyzed both teams and come up with three picks from the Copa del Rey semifinal between Real Betis and Rayo Vallecano. He has identified several factors why these wagers will cash. He's only sharing his Copa del Rey picks at SportsLine.

Who will win Real Betis vs. Rayo Vallecano? And where does all the betting value lie? Visit SportsLine now to get Jon Eimer's predictions for the Copa del Rey semifinal, all from the soccer expert who has been on a roll, and find out.