Will the Belgian reach his first semifinal in New York?

Two longshots for the title face off in the quarterfinals of the 2026 US Open in the match between Karen Khachanov and Alexander Blockx, and Wettbasis provides a prediction along with the latest odds. The Russian-born player is aiming for his second semifinal appearance since 2022, while the Belgian is making his debut at the tournament in Flushing Meadows.

For Blockx, reaching the quarterfinals already represents his greatest achievement at a Grand Slam tournament. Experience thus favors Khachanov, though unlike the Belgian pro, he had to dig deeper in the previous round. It took him five sets and a grueling match against American Tien to advance to this round of the US Open.

We therefore don’t think the young Belgian stands no chance, which is why we’re predicting the match between Karen Khachanov and Alexander Blockx will go to more than three sets. Furthermore, in what we believe will be a close match, the odds on Khachanov vs. Blockx going to at least one tiebreak could be worth considering.

Karen Khachanov vs. Alexander Blockx – Head-to-Head Record

Khachanov and Blockx are facing off for the first time. For the debut of this matchup at Arthur Ashe Stadium between Karen Khachanov and Alexander Blockx, the betting odds slightly favor a victory for the Russian.

Karen Khachanov vs. Alexander Blockx Prediction

Karen Khachanov reached the peak of his career so far between 2022 and 2023. During that time, he reached the quarterfinals of Grand Slam tournaments on several occasions and even made it to the semifinals twice at the US Open and Australian Open.

In the years that followed, however, his success curve took a sharp downward turn, which is why reaching the quarterfinals at this year’s US Open comes as quite a surprise. That said, a relatively easy draw so far has helped. With the exception of the No. 3-seeded Canadian Auger-Aliassime, his opponents haven’t been overly challenging.

In our view, that’s about to change: Although his upcoming opponent from Belgium is making his US Open debut, he’s in good form. At the previous Masters in Cincinnati, he reached the third round, and he’s been playing consistently well at the 2026 US Open. In his victories over the past four rounds, he’s lost no more than one set in each match.

We therefore consider him an equal opponent despite his limited experience at this level and do not expect an easy win for the Moscow native with Armenian roots. Consequently, for the match between Karen Khachanov and Alexander Blockx, a prediction of more than three sets seems advisable.