Ademola Lookman wasted no time making his mark in Spanish football, scoring on his Atletico Madrid debut as the Rojiblancos delivered a ruthless 5-0 demolition of Real Betis in the Copa del Rey quarterfinals on Wednesday night.

The Nigerian international, who completed his move from Atalanta in January, needed just 37 minutes to find the net for his new club, adding to first-half goals from David Hancko and Giuliano Simeone. Antoine Griezmann and Thiago Almada completed the rout in the second half as Diego Simeone's men booked their place in the semifinals for the third consecutive season.

Playing in front of 66,810 spectators at the Estadio La Cartuja in Seville, Atletico showed no mercy to their hosts from the opening whistle. Hancko broke the deadlock in the 12th minute, setting the tone for what would become a thoroughly one-sided affair. The attacking momentum continued when Giuliano Simeone, son of the Atletico manager, doubled the advantage in the 30th minute with a well-taken finish.

But the moment that had the traveling supporters on their feet came seven minutes later. Lookman, making his first competitive appearance in the red and white stripes, capped a brilliant team move to score his debut goal. The strike immediately endeared him to the Atletico faithful, who have been eagerly anticipating his arrival since the transfer was announced.

The 28-year-old left Atalanta under controversial circumstances, with reports indicating he had grown frustrated with what he described as broken promises and poor treatment at the Italian club. His performances in Serie A, including a hat-trick in the Europa League final, had attracted interest from several European giants, but it was Atletico who secured his signature.

Simeone's tactical setup proved devastating against a Betis side that simply could not cope with the visitors' intensity and movement. Lookman's combination play with Griezmann was particularly impressive, and it was the French forward who extended the lead to four in the 62nd minute, with Lookman providing the assist.

Thiago Almada added the fifth goal in the 83rd minute, putting the finishing touches on a comprehensive victory that sent a message to the remaining teams in the competition. Barcelona, Athletic Club, and Real Sociedad make up the other semifinalists, with the draw scheduled for Friday.

For Atletico, who sit third in La Liga and are 10 points clear of fifth-placed Betis, this result provides a significant confidence boost. The two teams are set to meet again on Sunday in league action, though Betis will need to regroup quickly after such a chastening defeat.

Simeone spoke glowingly of his new signing in the post-match press conference, praising Lookman's immediate understanding of the team's demands. The forward's ability to create and score will be crucial as Atletico pursue silverware on multiple fronts this season.

With performances like this, Lookman's decision to leave Serie A for La Liga appears fully vindicated. His debut goal marks the beginning of what Atletico fans hope will be a prolific partnership as they chase domestic and European glory.