Still got 99% of my trainers in their original box.
As for them Lendl - they were in my squad of 3 circa 86/87 and nothing else got a look in (even my Trimm Trabs). Lendl Court, Harvard and ZX600 were the 3 in question.
I, too, was certain they were called simply Lendl Court. I don't remember the Indoor monicker. The closest I've got now is a pair of white/black Grand Prix, which shares the same silhouette.
As you say, they were perfect for them Tachinni bottoms. I also had them, plus the top with the zip-off sleeves, and usually wore an Adidas Lendl polo-shirt (the one with the mad square & triangle shapes across the middle). The Lendl Court also went well with an Adidas New Yorker hooded trackie top I had around the same time.
Halcyon days indeed.