We were sloppy - McNamara
Dundee United boss Jackie McNamara admitted a sloppy first-half display cost his side following their 2-0 home defeat to Celtic.
Forward pair Georgios Samaras and Anthony Stokes took full advantage with a brace of goals as the visitors won comfortably at Tannadice.
"We were poor in the first half, we gave them too much space," McNamara told BBC Radio Scotland "We were a bit nervous in possession and let Celtic come on to us.
"The goals we lost were very cheap," he continued. "Second half we were far better with more energy. We got at them and had a few chances, which was pleasing, but a bit too late."