HU vs CaptZeemaster, actual content

[cardsharkk04]

2 Hands vs one of the best players on this forum. 1st one was right after capt took me out with JQ(I could be tilty). We both have 2k. He raised up to 80 and I call from the button with 10 8 off. Flop is 688 (i think), two diamonds. He bets pots, I bump it up to 450, he calls. Now I'm deciding whether I should bet around 800 or just push the turn if it isn't a diamond. I absolutely would hate a diamond (and zeebo prob can't fold a good draw), so when the 9c hit the turn I just shove the rest in. Do you think it better to bet less on the turn, and if so, will you fold to diamond hitting and a zeebo push?

Hand 2. This one is actually 3 way, 2k stacks. He raises to 80 from the button, which could be anything. I call with A 7 off. Flop is something like A J 6, two diamonds. He pots it, I call. turn is the ace of diamonds. I check he pots it again and I call? River is a blank, I check, he pushes, I fold. I hated this hand. Should I fold the turn?