Belgian Breakout: Alexander Blockx Stuns Defending Champion Casper Ruud to Reach Madrid Semi-Finals
In a stunning display of emerging talent, 21-year-old Belgian Alexander Blockx halted Casper Ruud’s title defense on Thursday, April 30, 2026, securing a place in the Mutua Madrid Open semi-finals. Blockx overwhelmed the 12th seed and 2025 champion with a 6-4, 6-4 victory at the Manolo Santana Stadium.
The match, which lasted 96 minutes, saw Blockx maintain high intensity to dismantle the Norwegian’s defense. Blockx established early control, breaking in the third game to take a 3-1 lead in the opening set. While Ruud attempted to fight back using his signature forehand to level the score at 4-4, Blockx remained composed, breaking again to close out the first set after 51 minutes of play.
The second set followed a similar pattern of aggression from the Belgian. Blockx surged ahead to a 5-3 lead in the seventh game. Despite squandering two match points on Ruud’s serve, he capitalized on his own serve to seal the upset and advance to the final four.
“To be honest, I’m just happy with being here,” Blockx said. “Even winning my first match here. I barely escaped in the first round, and I was happy about that already. Semi-finals is something I wouldn’t have even dreamed of to begin with.”
The victory marks a historic milestone for Belgian tennis, as Blockx becomes the first man from Belgium to reach the semi-finals in the history of the Madrid Open. Currently ranked World No. 69—a career-high reached after breaking into the top 100 last month—Blockx is also the fourth lowest-ranked player to ever reach the semi-finals of the event.
Blockx’s run in Madrid has been defined by a “giant-killing” streak, having knocked out four consecutive seeds, including 3rd seed Felix Auger-Aliassime and 16th seed Francisco Cerundolo. This surge is particularly notable given his recent history on the surface; prior to a third-round appearance at the Rolex Monte-Carlo Masters earlier this month, Blockx had never won an ATP Tour match on clay. He now enters the semi-finals boasting a 10-2 record on red dirt across qualifying and main draw matches.
Reflecting on his sudden success on the clay, Blockx attributed his performance to the unique conditions in Madrid. “I think the conditions suit me well here. I feel like it’s clay which is slow, so I have time to settle and hit my shots, go for my shots. At the same time, it’s quite fast with the altitude and the heat sometimes. I think it’s the perfect combination for me,” he added.
Beyond the national record, Blockx joins an elite group of young players making an impact at the Masters 1000 level. He is the second man born in 2005 or later to reach a Masters 1000 semi-final, following Jakub Mensik’s achievement at the 2025 Miami Open presented by Itau.
Blockx now moves one step closer to his first tour-level championship match. Standing in his way is either the second seed and two-time champion Alexander Zverev or 10th seed Flavio Cobolli.
