After-thoughts from Iowa’s 80-73 victory over Colorado:

--Iowa’s defense has looked better lately against some so-so competition. On Friday, it appeared improved against a good team. The Hawkeyes’ man-to-man defense was better than it has been and the zone, which they played most of the second half, was extremely effective. In November, they struggled to contain quick guards on Division II teams in exhibition games. This time they contained a power-5 conference guard who had 30 points and 11 assists in his previous game. It was the single most encouraging aspect of the victory.

--Second most encouraging thing: Maishe Dailey was tremendous. He hit a huge 3-pointer to regain the lead for Iowa in the final minute of the first half and continued to attack in the second half, scoring eight straight points in one stretch. He may be the perimeter creator this team desperately needs. His performance resulted in Brady Ellingson playing less than a minute in the game and he should continue to take minutes away from other players as the season progresses.

--Credit Fran McCaffery with having the sense to cast aside one of his standing rules, that a player who gets two fouls in the first half has to sit for the remainder of the half. Jordan Bohannon picked up two fouls in the first 2 minutes, 16 seconds, and he immediately came out. Connor McCaffery played fairly well in his place but is unable to play many minutes because of his recent bout with mononucleosis. When Ellingson came in to play the point and was immediately stripped of the ball for an easy layup, the coach opted to go back to Bohannon, who played the remainder of the game without committing another foul.

--Dailey said in a postgame television interview that the environment was “louder than a home game’’ and that certainly appeared to be the case. The crowd of 3,250 in the Sanford Pentagon provided vocal support the Hawkeyes seldom seem to get in Carver-Hawkeye Arena and it clearly had an impact on the outcome.

--The Pentagon playing floor has three 3-point lines — for high school, college and the G League team that plays there — and that created all sorts of confusion. Iowa made several perimeter shots that ended up counting for two points instead of three. Isaiah Moss made at least three of them with a foot on the college 3-point line. And when Moss made a 3 with 15 minutes remaining that clearly was behind the college line on television replays, the officials were even confused. They gave him two points and never corrected the mistake. Fortunately, the mistake did not factor in the outcome.

--It’s not certain whether the multiple lines were the reason, but the Hawkeyes finished with a season-low 3-pointers. Dailey, who was two for three, was the only Iowa player who had any sort of success from behind the line. Moss was 0 for 4 officially.

--Just when you think you’ve seen everything that can happen in a college basketball game: Colorado was assessed a technical foul with 4:46 to go when assistant coach Kim English was struck on the head by a live ball while out on the playing floor. A water bottle accidentally rolled onto the court while the game was going on and English stepped out and bent over to get it. As he did so, a long rebound came flying out and hit him in the back of the head. Never seen that one before.