In spite of the modest playing time, the 27-year-old all-rounder scored 24 points, grabbed 11 rebounds and added 2 steals and a block, as the Bonn club moved to 2-0 in Group M with an 83-64 victory against Redwell-Gunners in Oberwart.
On the back of a super-efficient night, with the player making 9-of-12 shots from the field, including 3-of-5 from three-point range, Horton finished the game with a league-best efficiency index of 33.
Elsewhere, Davon Jefferson continued his hot streak, on which he has been ever since arriving at Gaziantep midway through the Regular Season, by registering a ranking of 31 against BC Mures.
The 30-year-old American big man notched up his second double-double of the season by collecting 24 points, 10 rebounds, 2 assists, 3 steals and a block in an easy win in Romania.
In a good week for big men, Donar Groningen's center Drago Pasalic joined the Top Performers front court with a dominant performance against SL Benfica on the road in Portugal.
The Dutch team's man in the middle from Croatia made 10-of-16 shots from the field and had personal season-highs in points and rebounds with 21 points and 14 boards for a total index rating of 30.
There were plenty of firework-worthy performances from backcourt players as well. Demir Insaat guard Osiris Eldridge stuffed the stat sheet with 14 points, 6 rebounds, 7 assists and 6 steals, as the Turkish defeated Group L opponents Prievidza.
Meanwhile, Serbian combo guard Aleksandar Rasic had one of his best games of the season, scoring 21 points, grabbing 7 rebounds, dishing out 7 assists and coming up with 4 steals for U-BT Cluj-Napoca, as the Romanian side inflicted the first defeat of the season on Pau-Lacq-Orthez.