Yasir Shah has been released from Pakistan's Test squad for a brief period to work with recently appointed spin bowling consultant Mushtaq Ahmed at the National Cricket Academy in Lahore.
Yasir, 33, is not part of the Pakistan team currently engaged in the first Test against Sri Lanka in Rawalpindi, where the management went for an all-pace attack.
The leg-spinner, who became the fastest to 200 Test wickets last year, will re-join the squad ahead of the second Test in Karachi commencing on December 19.
For the next few days, Yasir will be under the tutelage of Mushtaq, who has inked a contract with the PCB that allows him to "work 120 days in a year at the National Cricket Academy with the U16, U19 and other domestic bowlers", according to the press release issued by the board.
Yasir has lately been woefully out of form given his lean run in the two-Test series in Australia.
He was guilty of leaking runs at a rapid rate, returning dismal figures of 4-402 across the two games.
While he failed to make an impact in his primary duties, Yasir finished as the second-leading run-getter for Pakistan in the series.
He scored 194 runs at an average of 48.50 including a memorable century at Adelaide - his first three-figure score in international cricket.
Despite his poor bowling display Down Under, he was still expected to retain his place for the Rawalpindi Test.