I think Splitter and Gasol had four major face-to-face games back in Spain.
Season 2006/07, Splitter was playing for Tau Vitoria, a team that led the regular season (ended up losing in semifinals against Barcelona), teaming up in the paint with Luis Scola, that season's MVP. Gasol was playing his first season for Akasvayu Girona (weak playoff team) on loan from Barcelona. It was his blossoming campaign after being in Ivanovic's doghouse back in Barcelona.
First game, in Vitoria:
http://www.acb.com/fichas/LACB51080.php
- Splitter: 13 points (5/5 FG), 7 rebounds, 24 minutes.
- Gasol: 10 points (5/9 FG), 5 rebounds, 24 minutes.
Second game, in Girona:
http://www.acb.com/fichas/LACB51229.php
- Splitter: 20 points (6/16 FG), 10 rebounds, 36 minutes.
- Gasol: 16 points (5/6 FG), 13 rebounds, 2 blocks, 29 minutes.
Season 2007/08, Scola leaves Tau, and Splitter remains as the team anchor in the paint as they win the ACB League. Gasol becomes the league's MVP and his team enters again in the playoffs for another early exit (of course Tau teams were much stronger than Akasvayu's).
First game, in Girona:
http://www.acb.com/fichas/LACB52004.php
- Splitter: 14 points (6/11 FG), 9 rebounds, 30 minutes.
- Gasol: 10 points (3/11 FG), 4 rebounds, 28 minutes.
Second game, in Vitoria:
http://www.acb.com/fichas/LACB52187.php
- Splitter: 13 points (4/8 FG), 4 rebounds, 24 minutes.
- Gasol: 19 points (9/13 FG), 4 rebounds, 5 assists, 2 blocks, 37 minutes.
For me it is obvious that Splitter should at least get a try on these series when Duncan is on the bench, particularly in the place of Blair, who looks extremely overwhelmed by the Grizzlies size.