Upul Tharanga and Sanath Jayasuriya hold the record for the highest 1st wicket partnership in ODI cricket with 286 runs against England in 2006. This record-breaking opening stand showcased their aggressive batting style and remains unbroken. Tendulkar and Ganguly had several memorable partnerships but never reached this particular milestone. Gary Kirsten and Herschelle Gibbs, Saeed Anwar and Aamir Sohail were great opening pairs but didn't set this specific record.