I Am Maximus and Nick Rockett - the past two winners of the Grand National - head the confirmations for Saturday's race at Aintree. The pair, both trained by Willie Mullins, won the race in 2024 and 2025 respectively and top the weights for the 2026 renewal. I Am Maximus, owned by JP McManus, triumphed by seven and a half lengths in 2024, before finishing two and a half lengths behind Nick Rockett who was victorious under Mullins' son Patrick last year. There are 49 entries remaining, and a maximum of 34 runners will line up on the day after the final field and four reserves are announced on Wednesday. McManus is seeking a record fourth victory in the race, and has leading hopefuls Iroko and Jagwar - both trained by Oliver Greenall and Josh Guerriero. Johnnywho is also guaranteed a run for McManus after withdrawals at the five-day stage. I Am Maximus is bidding to become the first horse to carry top weight to victory since triple winner Red Rum in the 1970s.…