McCall's side was undone by an early set-piece and a late counter-attack as its debut in the competition left it needing a momentous comeback in
Motherwell had good spells of pressure and possession and a number of half-chances but could not find a way past the visiting goalkeeper.
McCall said: "I think we more than matched them. I don't think the scoreline reflected the performance.
"I just wanted the lads to put in a performance their families and the fans would be proud of and they did that."
Well lasted 13 minutes before an inswinging free-kick from
The host had enjoyed some decent pressure before substitute
"I'm disappointed with the goals," McCall said.
"We talked about not giving silly free-kicks away with the boy's ability from set-pieces.
"It was a great area to put the ball into and the goalkeeper has to take a step across in case (Jean-Alain) Boumsong gets it.
"We started well and Las (
"But it wasn't to be.
"We always knew their threat on the counter-attack but they played it well. From their point of view it was a good goal."
McCall, who picked a 4-4-2 formation with attacking wide men
"We didn't want to go out with a whimper. We were pressing and probing and most people thought the goal was coming.
"It would have been nice if we could have got it to 1-1 but it wasn't to be."
Panathinaikos head coach
"Motherwell work hard and play football that is difficult to control but I thought we deserved the win."
UEFA Champions League
UEFA has announced that the Champions League final in 2015 will take place in Berlin's