These stars will be in the spotlight Tuesday night as the Fever look to hand the Shock a fourth straight home defeat.
Catchings made her season debut in Saturday's 71-70 home loss to San Antonio. She scored six points and grabbed seven rebounds in 20 minutes after missing the first 17 games due to a sore back.
"For me, coming out tonight, shaking off the rust as far as getting out there, having fun, being out there, despite the loss I'm excited about being out there and definitely excited about the potential of this team," said Catchings, whose career scoring average is 16.7 points.
The Indiana star has never averaged as many points as Diggins currently is for Tulsa. Diggins is second in the league with 21.3 points per game after she averaged 8.5 as a rookie a year ago.
The former Notre Dame star has improved her shooting considerably to 44.0 percent overall and 34.4 percent on 3-pointers after those figures were at 32.8 and 24.4, respectively, a year ago.
Diggins turned in another spectacular performance Saturday with 30 points as Tulsa (7-11) rallied from a 12-point deficit before falling 78-76 at home to Connecticut. Her driving layup with 24.3 seconds left tied the game and she was fouled on the play but the 83.3-percent foul shooter missed the ensuing free throw.
''A lot of our opportunities came up empty early and kind of set the tone for us,'' coach Fred Williams said. ''We hung in there and fought through some things that didn't go our way. We were able to tie the game there at the end. This was probably one of the most physical games we've had all year.''
Williams is in his first season with Tulsa, and his tutelage may have a role as to why Diggins has shown such dramatic improvement. The coach guided Atlanta's Angel McCoughtry to the scoring title last season.
Diggins is averaging 26.1 points over her last seven games.
Indiana (8-10) may be happy to go on the road after losing its fourth straight at home Saturday. The Fever have led in the second half of all those defeats.
''Bad decisions,'' coach Lin Dunn said. ''We're not doing a good enough job in crunch time of taking care of the basketball. We're still learning the hard way.''
That four-game home slide began with a 107-102 overtime loss to Tulsa on June 25. The Shock rallied from a 17-point second-half deficit and ended a seven-game losing streak in the series behind Diggins' 32 points.