Pakistan coach Mickey Arthur believes his "fearless" side have everything to gain when they face an "under the pump" England in the first Test at Lord's on Thursday.
Pakistan bowling coach Azhar Mahmood suggested Amir had suffered a recurrence of a "chronic" problem.
Mohammad Hafeez had raised objections over ICC's procedure of dealing with suspect bowling actions.
Hardik Pandya and Dinesh Karthik will also be a part of the ICC World XI's star-studded line-up which will be led by England's Eoin Morgan.
Ireland's Test cricket's chief executive said that Ireland are open to touring Pakistan if all the stars align
Imam-ul-Haq, the nephew of selection chief and former Test batsman Inzamam-ul-Haq, saw the tourists to victory with a total of 160 for five.
This was Kevin O'Brien's first century for Ireland since he made the fastest-ever World Cup hundred by any batsman, off 50 balls, against England at Bangalore in 2011.
Sachin Tendulkar disclosed recently that his first Test innings, vs Pakistan in Karachi in 1989, would be his last.
Mohammad Amir aggravated an old injury while bowling in Ireland's first-ever Test match.
Ed Joyce was 39 not out and Ireland captain Porterfield unbeaten on 23 at the close after they were both dropped off Mohammad Amir.
Shadab Khan and debutant Faheem Ashraf both scored maiden Test fifties as Pakistan fought back in Ireland's inaugural Test match in Dublin on Saturday.
Shoaib Malik's next assignment is the Caribbean Premier League.
Former Pakistan all-rounder Abdul Razaaq, who last played a first-class game in 2014, is set to return to competitive cricket to push his selection for the Pakistan Super League (PSL).
Mohammad Hafeez was reported for a suspect action for the third time during a One-day International with Sri Lanka in October last year.
Old Trafford in Manchester will host maximum six matches, while Edgbaston in Birmingham, Hampshire Bowl in Southampton, Lord's and The Oval (both in London), and Trent Bridge in Nottingham will stage five matches each.
The 10-team cricket extravaganza will be played between 30 May and 14 July next year.
Pakistan Cricket Board chief Najam Sethi feels that resumption of bilateral Indo-Pak cricketing ties is solely dependant on India's will