Magnus Carlsen secured his 20th world title, winning both the 2025 World Blitz and Rapid Championships. This achievement fuels ongoing comparisons between Carlsen and Garry Kasparov regarding their greatest status. Carlsen, who has held the No. 1 ranking for an extended period, defers the 'greatest' debate, stating his focus is on present achievements. Kasparov, a former world champion and brief trainer for Carlsen, acknowledged Carlsen's success, noting that champions build on the work of predecessors.