Last night's semi final saw Lisa perform the Salsa and American Smooth, but the pair had to cut all three lifts from the latter dance due to Lisa's size.
Speaking to The Sun, Robin said: “Last week, the tango was the best Lisa has done.
“It’s still not how I’d like it to be but because of her size she’s quite limited. I hope the public realise how difficult that is for her.”
Robin and Lisa did however keep in a daring move in their Salsa, which didn't all go too well.
The judges - and us - were left laughing after Lisa first fell during the move and then Robin struggled to pick her back up again.
Robin confessed he was plagued with nerves before performing the routine yesterday.
He said: “If it goes wrong it could end in absolute disaster.
“But I’ve taken lots of chances by throwing myself at Lisa – so we’ll see what happens.”
Strictly Come Dancing continues tonight with the results show on Sunday 16th December at 7.30pm on BBC One and BBC One HD.
Browse pictures from tonight's Strictly Come Dancing semi-finals below...