SENIOR (2014-15): Member of NCAA Championship team ... Ranked 48th in the country in singles during the fall ... Went 7-1 in singles, despite battling an injury ... Beat Lynn's Mehdi Laalej, 6-2, 7-5, at No. 4 singles to clinch Sunshine State Conference Tournament title ... Defeated NAIA No. 7-ranked Matias Hatem, 7-5, 0-6, 6-3 ... Won 12 doubles matches at No. 2 position with two different partners ... With Dominik Haider, beat Cameron's Joao Fazendeiro and Dennis Merdan, 8-1, in NCAA quarterfinals ... Beat Azusa Pacific's Pascal Engel and Leahy, 8-3, at No. 2 doubles in NCAA Round of 16 ... Advanced to United States Tennis Association/Intercollegiate Tennis Association South Region Championships doubles semifinals with partner Ahmed Triki ... Athletic Director's List in fall and spring .... Sunshine State Conference Commissioner's Honor Roll in spring.
JUNIOR (2013-14): Honorable Mention All-SSC in singles ... Went 11-1 in singles ... Beat Stillman's Edward Symonett, 6-0, 6-0, at No. 6 singles in NCAA South Region 2 semifinals ... Beat Embry-Riddle's No. 38-ranked Miguel Lopez Gomez, 3-6, 7-5, 10-8 (Feb. 9) ... Won last six singles matches of regular season ... Went 15-1 in doubles, winning first 15 matches of regular season ... Was 12-1 with partner Renato Lombardi, winning 12 consecutive matches ... Went unbeaten with Lombardi in doubles in regular season ... Along with Lombardi, defeated Drury's Sergio Manzanas and Jakub Sipos, 8-4, in NCAA Round of 16 ... Beat Concordia (N.Y.) Tomasz Olfans and Pulat Babadjanov, 8-3, in NCAA quarterfinals ... Beat teammate Nico Dreer, 6-4, 6-4, to win Florida Gulf Coast Fall Open Gold Flight singles title ... Went 3-0 in singles in Varner Invitational, beating teammate Fabian Groetsch, 6-3, 6-2, in semifinals ... Dean's List in spring ... SSC Commissioner's Honor Roll in spring.
SOPHOMORE (2012-13): Member of NCAA Championship team ... Was 11-2 in singles ... Beat Konstantin Zhukov, 6-1, 6-2, of No. 32 Northwood (Mich.) in NCAA Round of 16 ...Defeated Raphael Oliveria, 6-2, 6-1, of Alabama-Huntsville in NCAA South Region semifinals at No. 6 singles ... Beat Alexander Roggenkamp, 6-2, 6-1, of No. 13 Grand Canyon at No. 5 singles ... Won six straight singles matches at end of spring ... Had 4-1 doubles record ... Went 2-1 at Florida Gulf Coast Fall Invitational, advancing to quarterfinals ... Went 1-2 with Romain Costamagna in doubles at FGCU, beating Miami's Mark Schanerman and Henrique Tsukamoto, 8-4 ... Athletic Director's List in spring.
FRESHMAN (2011-12): Went 10-6 in singles ... Was 4-0 in doubles ... Went 1-0 vs. nationally-ranked singles opponents ... Dean's List in fall ... Athletic Director's List in spring ... Member of SSC Commissioner's Honor Roll in spring ... ITA Scholar All-American.
HIGH SCHOOL & AMATEUR: Won two USTA tournaments in Tampa ... Ranked No. 1 on Federacion Espanola junior circuit ... Competed in Real Club DePolo events.
PERSONAL: Son of Alexander Sielmann and Cristina Balsells ... Has a younger brother, Robert ... Graduated with a degree in management.
| SINGLES | Record | 1 | 2 | 3 | 4 | 5 | 6 | Tour |
| 2012 | 10-6 | --- | --- | 3-1 | 2-2 | 1-1 | 4-2 | --- |
| 2013 | 11-2 | --- | 1-1 | 0-1 | 1-0 | 6-0 | 3-0 | --- |
| 2014 | 11-1 | --- | --- | --- | 3-0 | 2-0 | 6-1 | --- |
| 2015 | 7-1 | --- | 1-0 | 2-0 | 3-1 | 1-0 | --- | --- |
| Totals | 39-10 | --- | 2-1 | 5-2 | 9-3 | 10-1 | 13-3 | --- |
| DOUBLES | Record | 1 | 2 | 3 | Tour |
| 2012 | 4-0 | --- | 1-0 | 3-0 | --- |
| 2013 | 4-1 | --- | --- | 4-1 | --- |
| 2014 | 15-1 | 1-0 | --- | 14-1 | --- |
| 2015 | 12-6 | --- | 12-6 | --- | --- |
| Totals | 35-8 | 1-0 | 13-6 | 21-2 | --- |
