Question: The Messerschmitt 109TL was an alternative design proposed as a backup for a fighter version of a plane nicknamed what? 
Sentence (from "Focke-Wulf Fw 190"): Along with its well-known counterpart, the Messerschmitt Bf 109, the Focke-Wulf 190 Würger became the backbone of the Luftwaffe's "Jagdwaffe" (Fighter Force).
Relevant evidence: No