Bosnia/Herzegovina, Georgia, Finland and Liechtenstein all ensured that they would compete for places in Zone Group I in Saturday's promotion play-offs, as all four nations recorded their second victories at the Fed Cup by BNP Paribas Europe/Africa Zone Group II event on Thursday.
Jasmina Tinjic led another recovery from Bosnia/Herzegovina, as the team was once again forced to come from 0-1 down to win the tie.
Egypt's Sandra Samir lost the first set to Dea Herdzelas but fought back admirably, eventually prevailing 46 64 62 in one hour and 51 minutes. But Tinjic dispatched Egyptian No. 1 Mayar Sherif in straight sets to take the tie into a crucial third rubber.
Teaming up with Husaric this time, Tinjic was able to repeat the heroics she showed in Wednesday's marathon doubles rubber, as the Bosnia/Herzegovina pair once again claimed victory despite losing the first set.
The result means that Bosnia/Herzegovina remain in second place in Pool B, and face a play-off tie on Saturday as the team attempts to bounce straight back to Group I.
In the other tie in Pool B, Georgia faced a challenging encounter against South Africa, with the South Africans desperate to record a win that would haul them back into contention for the promotional play-off spots.
And things started brightly for them, as Madrie Le Roux won her second singles rubber of the week to put them in the driving seat.
However, Georgia's Sofia Shapatava proved too good for Chanel Simmonds, meaning that this tie would also be settled in the doubles rubber.
The match proved to be an extremely tight affair, with the first two sets being decided on tie-breaks, but it was ultimately the Georgians who emerged triumphant, winning in two hours and 50 minutes. South Africa will now have to face a Zone Group II relegation-play off for a second consecutive year.
Meanwhile in Pool A, hosts Lithuania threatened to cause a major upset as Lina Stanciute defeated Liechtenstein's Stephanie Vogt, proving that rankings can sometimes make no difference when it comes to the Fed Cup.
After Kathkinka von Deichmann had put Liechtenstein 1-0 up, the Lithuanian No. 1 lost a tight first set tie-break before raising her game to secure an impressive 67(7) 62 64 victory.
However, Vogt found her form in the deciding doubles rubber, as she and Von Deichmann ran out 61 64 winners to give Liechtenstein a chance of reaching Zone Group I for the first time in its history.
After being on the wrong end of a mauling from Liechtenstein on Wednesday, top seeds Montenegro were unable to stop the rot as their team again succumbed to a 0-3 defeat, this time at the hands of Finland.
Emma Laine and Piia Suomalainen each won a singles match in straight sets before Ella Leivo and Roosa Timonen both made their first appearance of the week, winning 60 60 against a demoralised Tamara Bojanic and Nikoleta Bulatovic.
Tomorrow's Pool A fixtures see Lithuania face Montenegro and Liechtenstein take on Finland, while in Pool B South Africa will play Egypt and Bosnia/Herzegovina meet Georgia.
All four teams currently in third and fourth places the pools are now unable to catch the second-placed nations, meaning that we now know which teams will compete in both the promotion and relegation play-offs.
Tomorrow's ties, therefore, will determine which teams will meet in all of Saturday's crucial play-offs. All eight nations will undoubtedly be looking for a win, as they aim to hit the play-offs in top form.
Full details of the results, fixtures and standings in Europe/Africa Zone Group II can be found here.