BAKU, Azerbaijan—Denmark’s journey at the European Championship is headed to London. The Danes, who have developed into a surprise contender after their tournament began with midfielder Christian Eriksen suffering cardiac arrest on the field, advanced to the Euro 2020 semifinals on Saturday by beating the Czech Republic 2-1. Following the usual tributes to the recovering Eriksen from UEFA and fans—a giant No. 10 shirt laid out on the field and a “For Christ10an” banner in the stands—Denmark quickly took control against the Czechs on a hot and humid night in Azerbaijan. Jens Stryger sent an outswinging corner in the fifth minute to Thomas Delaney, standing in space by the penalty spot. Delaney’s bouncing header went in past the outstretched hand of goalkeeper Tomáš Vaclík. Denmark doubled the lead just before halftime. Joakim Maehle hit a cross from the left using the outside of his right foot. The ball eluded Martin …