Both Mendis and Nissanka reached their fifties in the same over, adding pressure on Pakistan. Shadab Khan provided some relief by dismissing Nissanka, but Mendis was relentless. 

He and Samarawickrama rattled Pakistan by launching powerful sixes off Haris Rauf. Shaheen Afridi's inclusion couldn't stem the tide of boundaries, as Sri Lanka reached 181/2 at the halfway mark.

Mendis's Century Delight:

Mendis continued to dominate, smashing boundaries and even hitting Ali for three consecutive sixes before eventually getting caught for a magnificent 122 off 77 balls. 

Charith Asalanka briefly gave Pakistan hope with a wicket, but Samarawickrama's fifty and his partnership with Dhananjaya de Silva kept Sri Lanka's run rate high.

With 41 overs gone, Sri Lanka looked set for a score close to 375. However, Pakistan made a late comeback by taking wickets at regular intervals. 

Sadeera Samarawickrama celebrates his maiden ODI century

Nawaz and Afridi struck crucial blows, including the removal of Dasun Shanaka. Although Samarawickrama reached a maiden century in his ODI career, his late dismissal limited Sri Lanka to just nine runs in the final two overs.

Sri Lanka's commanding total of 344/9 posed a significant challenge for Pakistan, whose openers are currently struggling for form. 

Mendis and Samarawickrama's extraordinary performances provided a thrilling spectacle for cricket fans worldwide, leaving Pakistan with a formidable task ahead in this World Cup clash.