Diallo didn't play in the first five games for Kansas (5-1) because the NCAA was looking into his academic work from a New York prep school as well as his relationship with his guardian. That investigation ended Nov. 25, with the NCAA clearing the 6-foot-9 Diallo after determining he received a limited amount of impermissible benefits.
He still had to sit out that night's Maui Invitational title game, which Kansas won by beating then-No. 19 Vanderbilt 70-63, before finally getting on the court Tuesday against Loyola.
Diallo didn't start and was given a standing ovation when he checked in. He got even more applause throughout the game with a trio of highlight-reel dunks, 13 points - all in the second half - six rebounds and three blocks in 16 minutes of a 94-61 victory.
''He told me two days ago, `I don't get nervous.' Then yesterday, `Oh, coach, I'm so nervous!''' Self said.
Wayne Selden Jr. had 18 points after being named co-Big 12 player of the week on Monday and co-Most Valuable Player in Maui. One of his four assists was a behind-the-back pass to Diallo, who slammed it home.
Diallo said he had trouble sleeping Monday night.
''I was thinking about this game; like what to do, rebound, block shots,'' he said. ''In the first half I played seven or eight minutes and got zero points and I was thinking, 'Wow what am I supposed to do in the second half?' I was so scared and nervous, but now I am so excited the game is over and I played really well.''
The same can be said of Kansas, which is among the nation's leaders in points per game (93.5), scoring margin (plus-23.5), field-goal percentage (51.2), 3-point shooting (45.7) and assists (19.2).
During its current four-game win streak, Selden has averaged 19.0 points on 64.3 percent shooting and has hit 15 of 23 from 3-point range.
The Jayhawks, though, could be in for a challenge offensively against Harvard (2-5), which ranks near the top of Division I in field-goal defense (35.5) while holding opponents to 61.1 points per game.
The Crimson, however, likely won't be able to keep up with Kansas as they average 63.1 points. They're also 0-4 on the road, while the Jayhawks' 26-game run at Allen Fieldhouse is tied for the eighth-best in school history.
This is the third of four straight games away from home for Harvard, which lost 80-71 to Northeastern on Wednesday despite shooting a season-high 55.4 percent.
Harvard dropped both matchups against Top 25 teams last season but nearly upset 15th-ranked North Carolina in the second round of the NCAA Tournament, falling 67-65 to the fourth-seeded Tar Heels after leading by two with 1:15 remaining.