"The 18th hole wasn't kind to us, we didn't play it well," McGinley told Sky Sports News. "Sixteenth hole as well we didn't play it well. Fourteen, 16 and 18 are going to be crucial holes this week and we didn't play them well today.
"It's a long road, there's no need for panic. Unfortunately it's another session lost. We're getting in a habit now of losing sessions so it's important we have a good afternoon today."
The scoreline is currently 2.5-1.5 in the Americans' favour, but the players are back on the course for the foursomes session.