Is a defendant entitled to a new trial if he received ineffective assistance of counsel?

A defendant is entitled to a new trial if he received ineffective assistance of counsel at trial. (People v. Lagunas (1994) 8 Cal.4th 1030, 1036.) "Establishing a claim of ineffective assistance of counsel requires the defendant to demonstrate (1) counsel's performance was deficient in that it fell below an objective standard of reasonableness under prevailing professional norms, and (2) counsel's deficient representation prejudiced the defendant, i.e., there is a 'reasonable probability' that, but for counsel's failings, defendant would have obtained a more favorable result. [Citations.] A 'reasonable probability' is one that is enough to undermine confidence in the outcome. [Citations.]