11:30 p.m. update: The Heat upgraded its backcourt and landed a highly skilled defender on Thursday morning when it dealt P.J. Tucker to Toronto for guard Davion Mitchell. “I feel like I’m the best defender in our league, honestly,” Mitchell said in a past interview. “Off ball or on the ball, I just feel like that’s who I am.” Mitchell, 6-0, is averaging 6.3 points, 4.6 assists, 1.9 rebounds and shooting 43.4 percent from the field and 34.9 on threes in 44 games and 22 starts for the Raptors. This is his fourth NBA season; he spent the first three in Sacramento. Mitchell, selected by Sacramento ninth overall out of Baylor in 2021, was traded last June -- with Sasha Vezenkov, the draft rights to Jamal Shead and a 2025 second-round draft pick --to the Raptors in exchange for Jalen McDaniels. Mitchell, 26, is holding the player he’s guarding to 44.6 percent shooting, compared to the 46.5 percent they shoot overall. That is the best of all the Heat rotation guards, except for swingman Jaime Jaquez Jr. As a comparison, Terry Rozier is allowing players to shoot 47.8 percent, Tyler Herro 48.8 percent.