15 love Tennis term

I noticed that the Shorter Oxford Dictionary abstains from expressing any opinion on this topic. Personally I see no clear link between "playing for love" and scoring nil, and I don't think either of the explanations is well documented.
Yet, that such visual comparisons are not impossible may be illustrated by the Dutch habit of calling a O-O score a "specs score" ("Bril-score".)

When checking in the an older version of the Oxford Dictionary I noticed that already in 1780 the "Gentlemen's Magazine" described the origins of "love" in the meaning of "nil" as unknown. "We are not told how love came to mean nil."