There's a fabulous documentary called Fire and Ice about Borg and McEnroe. Their mutual affection is ridiculously touching.
There's a cracking bit where they're a couple of old fellers standing on the Centre Court and reminiscing. Borg says, "If you'd have broken me in the first game of that fifth set, you probably would have won the match..."
"...But you didn't
!" says Bjorn in a really cool way.
It's at 1:36 on this clip:
McEnroe also goes on to say how he now says 'I love you' to Borg when he phones.