Coventry City manager Mark Robins said that his side had a chance and missed it and Portsmouth had a chance and scored as the League One leaders sent the Sky Blues to a 1-0 defeat at the Ricoh Arena.
Robins told the media about the defeat: "We had a good chance and missed it, and they had a good chance and scored it. That is the difference.
"We started to look like we were going to build a head of steam up - we made positive changes, we were moving forward and the crowd started to lift and it just fizzled out which is disappointing.
"Overall, not enough was done, not enough chances were created and the chances we did create we did not take and it proved costly.
"You can see why they're at the top of the league - they are very functional and have good quality up top with [Brett] Pitman and their two wide players who we kept fairly quiet tonight.
"It is disappointing, but we have got to bounce back with another big game on Saturday - we are not too far away."