Alexander Zverev’s poor season continued on Wednesday when the German number one lost to Danish teenager Holger Rune 6-3, 6-2 at the ATP tournament in Munich. Two-time tournament winner Zverev received a bye in the first round as the top seed but the world number three had no answers to the unheralded 18-year-old, who sits at 70 in the rankings. A stunned centre court could hardly believe how much he was dominated by the Dane, especially with drop shots. Zverev also made many unforced errors en route to defeat in just over 90 minutes on Rune’s second match point. “I’m sorry. I’m sorry for the …