Yes, you might be right, she actually wants it without being forced that much. In CZ there is a big tradition of team competitions - something which we know from socialism, where the team/collective were always the base - thats why we could get a lot of information about the team competitions in the socialism (Davis Cup and Fed Cup) or general events (Olympics) but none about the single tennis competitions because it was a part of the general propaganda here in CZ (collective/team was all, while tennis singles not that interesting to be televised or advertised).
Great example here:
US Open 1986 finals: "Martina Navratilova defeated Helena Suková" 6–3, 6–2 and "Ivan Lendl defeated Miloslav Mečíř 6–4, 6–2, 6–0" - all of them were Czechs or "original Czechs", but the 2 disciplined of them (Sukova, Mecir) were clearly supposed to lose, so nobody informed about it on TV that time although it was really a big success of the Czech tennis school. If the same had happened in a team competition at that time, it would have surely been televised with all the proper fame (Fed Cup final in Prague, where Martina spoke her legendary words to Czech crowd while being followed by the communistic secret police).
As I know Petra's family, her father is a proud Czech who always likes to see her being a part of the CZ team (if generally possible and Petra's health is OK). Considering Petra was educated and led that way, no wonder that she always wants to join the Prostejov's team in that Czech league final competition. As I told, the roots of this can be found somewhere else - perhaps somewhere in the the past.
I dont think, Maria, Vika or Serena would be that much interested to play some national league final if they were called on to join their team. They simply prefer the individual competitions while Petra likes both of them...
Great insight and example, yeah that's how things were before 1989.
Your example with Navratilova reminded me of one issue we discussed here in the past: top Czech players, Petra included, sometimes struggle with their compatriots despite being the clear favourite to win the match. For example Petra's straight-set loss to Hradecka in Madrid and the loss to the same player in the Extraliga finals (despite being ranked much higher) or the struggle with BZS at the 2011 Paris Indoors (Petra had to save a matchpoint).
Now look at this funny past example which concerns Martina (take it as an off-season speculation on tennis history
In 1983, Hana Mandlíková defeated Martina Navratilova in three sets in the final at Oakland, California, ending Navratilova's 54 match winning streak
, two short of tying the record held by Evert at the time. Navratilova then embarked on a 74 match winning streak
, a record that still stands.
So, if Navratilova was not defeated by a fellow Czech player (product of the same system), she could have been on a 128-match winning streak!
To make it even more amazing, who did snap Martina's 74-match winning streak in 1984? Yes, another fellow Czech player, Helena Suková (and denied Martina from calendar grand slam)!
Considering that in 1984 Martina had a 82-2 record, if it were not for fellow Czechs Hana and Helena, she could have been on sth like a 150, 160 or even 170-match winning streak
Conclusion: Petra better learn from the Martina example and watch out when playing fellow Czech girls, they have no respect and can deny you from a calendar grand slam or snap the best winning streak ever